Job preparation is integrated into the curriculum, and students will build an online presence, resume and LinkedIn profile by graduation. Hack Reactor places alumni in mid-to-senior level positions at companies in tech, including Google, Salesforce & Microsoft, with an average graduate salary of $105K (2017 San Francisco student outcomes survey; 81% survey response rate).
Recent Hack Reactor Reviews: Rating 4.7
Recent Hack Reactor News
- June 2020 Coding Bootcamp News
- Coding Bootcamps + COVID-19: Updates, Scholarships and Tips for Learning Online
- How Kevin Landed a Job at Google after Hack Reactor
In PersonFull Time40 Hours/week12 Weeks
Start Date None scheduled Cost $17,980 Class size N/A Location Denver, Seattle, Phoenix, Boulder, New York City, Los Angeles, Austin, San Francisco, OnlineThe Hack Reactor immersive coding bootcamp is focused on building autonomous, fully capable software engineers. Every unit in our curriculum has been pored over numerous times to optimize for educational power and efficiency. The first half of the course is often described as “drinking from a firehose” because of how much information it packs in. In the second half, you use your new skills to build projects, while learning new technologies on the fly. By the end you will be an autonomous engineer, capable of tackling unique, unfamiliar problems and building complex applications.
Deposit After you have been accepted, a small deposit is required in order to secure your spot in the class. Financing Tuition Plans Financing options are available. Refund / Guarantee No Scholarship $1.3MM Hack Reactor Scholarship Fund - visit www.hackreactor.com/scholarships to apply!
OnlinePart Time20 Hours/week36 Weeks
Start Date None scheduled Cost $17,980 Class size N/A Location OnlineLearn full-stack engineering over nine months. Same Hack Reactor curriculum, program and quality - no need to quit your job. Class is held live online with two weeknights and one half-Saturday per week plus required independent study.
Deposit After you have been accepted, a small deposit is required in order to secure your spot in the class. Financing Tuition Plans Applicants who would otherwise be unable to attend Hack Reactor may split their tuition into installments and finish paying a portion of tuition up to six months after graduation. Refund / Guarantee No Scholarship $1.3MM Hack Reactor Scholarship Fund - visit www.hackreactor.com/scholarships to apply!
Hack Reactor Reviews
282 reviews sorted by:
- Boya • Fullstack Developer • Student • Course: Hack Reactor • Campus: San Francisco
Hack Reactor is a results-driven curriculum, so I'm here to tell you if and how you can get the results you want. If you work your ass off and you have a decent education/resume, you shouldn't have too much of a problem getting your desired returns from Hack Reactor. I was formerly an attorney that was very frustrated with the legal market, so I pivoted to software and HR had the best reputation. It wasn't easy to get admitted, but if you get admitted to the San Francisco main campus, I'd definitely recommend going. It is important to keep in mind that it seems like the bubble for developers is growing, and it's not entirely certain whether there will be further forseeable growth in the market (although now that it's harder to get work visas, it might help). It's not a sure thing, I think a couple of people in my cohort had a tougher time finding a job, but most everyone found one. The curriculum is great, but it relies all on you to power your engine through it. No one is going to hold your hand through the learning process; be prepared to teach yourself. The BIGGEST asset that hack reactor has is that you will be surrounded by very driven, talented, and friendly individuals. My cohort (HR39) worked together and left no man behind, and we are very close even after the experience is over. If I could do it over again, I would do the exact same thing. After working about 75 hours a week at Hack Reactor, I received an offer for $120k base in San Jose in under a month. Again, it takes hard work though to achieve your dreams. I sent out almost 200 applications in the single month using angellist, hired, linkedin, ziprecruiter and application portals on websites. If you are smart, driven, and feel that you are being underutilized at your current job, I would highly recommend Hack Reactor. Be aware though that nothing is guaranteed no matter how gaudy the numbers were. Everyone works very hard to make it so, and the students, staff and Space Ops crew is amazing (despite underpaid). A handful of students seemed to have problems finding jobs. Most of them didn't apply to enough in my opinion, as it's a numbers game (i did 200 apps in a month and so can you). A handful, despite being good programmers, had pretty weak professional or academic resumes though, and seemed to find the market harder to break into. If you're talented, hard working, and having somewhat of a proven track record as a good human being, Hack Reactor is a vehicle that can help you successfully transition into web development.
- Not worth 18000 dollars.- 2/28/2017Se Yo Honth Othxd • Engineer • Graduate • Course: Hack Reactor • Campus: San Francisco
In this age of refined open source and cost effective online materials you dont need Hack Reactor to teach you how to code.
Anyways the best way to learn is by using it in a project. Like you will best learn how to cook is by making your favorite dish and in the process you will google recipes, ingredients, best practice and then you will start putting them in place to make your super uber dish. First time it will not be great but will give you a base to improve upon until you get it right.
Apply the principles above to learning to code and make a portfolio of projects (not just tutorials but something actually most you have done yourself)
It will greatly enhance your experience if you find a friend or meetup to code along.
Boom, a couple of months of incremental progress leads to a solid skill you can take to your new job.
Hack Reactor is just a streamlined path of doing the above, and in no means a right of passage or even the best/right way of becoming a successful engineer. (I chuckle when they say Software Engineer. Even CS degree majors do not qualify as Engineers) but that is what you will want to become I am guessing in going to HR.
If this was 10-12 thousand dollars, it would have been worth it, probabily. 18-20 grand, common. Maybe 4 years ago when the best you could get online was a bunch of scrappy blogs. Someone can sue them for claiming to train Software Engineers, because that implies a lot more than going to a germ infested incubator of jam packed students puffed up with false hope after learning basic stuff about data structures, algorithms, a few libraries and frameworks, half of which are old redundant stuff. In the end even they will tell you not to mention HR in an interview, the real reason I will tell you after coming out on the other end is no one gives a c rp about HR, not because there is a bias which there is but because it is just bs that HR is teaching Software Engineering and any good engineer will hire you based on your skills, NOT coz you went to HR unless they are grads.
Staff are pretty awesome, building sucks, curriculum needs major over hawl not only because of old tech but also because for the first half you are learning mindlessly ie passing tests without knowing what the technology is or how its used. A better way would be that students implement a basic app after the two day sprints indivisibly. Fellow students are possibly the best thing about HR.
Seriously find friends who are doing the same thing and go through one of the online courses like the nano degree at udacity for 150 bucks or so is pretty good place, codeacadmy is a good place to start learning languages, freeBootCamp is a good one. Pick one, finish it. Boom Save 18000 bucks.
As far as the 105 grand salary, most people come to HR from strong CS back ground. Quarter have CS degrees, Quarter have some other engineering or relevant degrees, 10% are Berkley or similar grads. 30+% have significant prior experience from job as a developer and 10% have little background and take significant time to build up skills and get lower income spectrum jobs. Compounding all of this gives 105 grand average which is smart on their hand, only admit people who know how to code and this is what you get.
Good people. I would say that for sure. A lot of good iterative stuff going on. 10-12 thousand is a worth it experience.
- Literally Career Defining and Life Changing- 1/5/2017Kevin • Software Engineer • Graduate • Course: Remote Part-Time Software Engineering Immersive • Campus: Online
I'm going to let you all know that I was 120% skeptical about the whole coding bootcamp experience. I mean, how can anyone expect to come out of a 3 month bootcamp with enough knowledge to be a mid or senior level software engineer? And how the heck did Hack Reactor skew their numbers to get such insane statistics?
Who I am:
- Business major in college coming from reputable and decent paying account manager type jobs
- Questioned if I was good at coding because I'd never done anything remotely technical besides some math, econ, and stats
The Bread and Butter of this Review:
- The remote experience requires intense self-discipline, but the curriculum is so well structured that you will definitely feel the pressure to be present and be on top of your game.
- Software engineering and programming is all about learning to be independent and figuring out creative solutions to the problem. I kid you not, I think i spent half the time during coding on Stack Overflow or becoming a pro Googler.
- Programming is not cookie cutter - it's like a language so sometimes you can express it in ways that aren't great, but still get the job done. Therefore, you will often find that the 2 day sprints in Hack Reactor don't necessarily explain solutions exactly in the way you want it. However, they really take a lot of time to explain methodology and do walkthroughs if you are struggling.
- You have to bust your butt every day. This is a unique time period in your life if you choose to follow through with the program. It's only 90 days long. Do whatever it takes and learn the material.
I got a job before my program even ended at an awesome company doing fullstack software development (senior to midlevel) and I didn't even know how to program a year ago:
Many of cohortmates have already gotten AWESOME software engineering jobs in line with Hack Reactor's statistics. If you are remotely competent and feel like you need someone to give you guidance and help boost your career towards something you really feel passionate about - DO HACK REACTOR.
- Maher D • UI Software Engineer • Graduate • Course: Hack Reactor • Campus: Austin
I attended Hack Reactor (at the time still MakerSquare) from April to July of 2016. I then stayed on 3 months longer as a fellow, but this review will only focus on my student experience.
At first my research focused on traditional higher education. CS master's programs, mostly. However, I had little desire to do research or otherwise re-enter academia, so the value of a traditional graduate degree did not at all warrant the cost for me. Eventually, a serendipitous browse through alternative options led me to coding bootcamps, and eventually MakerSquare which had a campus conveniently located in my hometown. My honest first reaction to their claims (and the tuition) was “yeah, right.” I binged on all reviews, good and bad, before deciding to go the self-study route. Besides, I was already a developer. What could a costly 3-month program teach me that I can’t learn for free on the internet?
Fast-forward a year to early 2016, and I had barely gotten off the ground. I had more responsibilities at my old job and had little residual willpower to learn web on my own. Sure, I convinced myself a few nights a week to put in a couple extra hours and work through online tutorials, but it was a half-assed effort at best. At that point I realized I was missing a few key factors: accountability, structure, and a collaborative environment. I finally admitted to myself I'm the kind of person who needs the pressure to thrive and learn. That’s when I decided to go for it. After all, it's exactly that kind of environment HR seemed to be good at providing. Another major selling point for me was the networking potential. In my experience the tech industry is smaller than you think, and making many new connections can prove helpful in unexpected ways.
A recurring theme you’ll notice in coding bootcamp reviews is that you get out of it what you put in. This applies to Hack Reactor even more so because of the volume of information coming your way combined with the ambitious 3 month timeline.
I soon learned that head start was marginal, because the course hits the ground running with only a few intro lectures to get you acquainted with the staff, facilities, etc. After that you jump right into alternating between lectures and partnered assignments (sprints). In fact, the entire first half consists of sprints spanning a couple days each. Again, it’s easy to hit information overload in this time - your brain can only absorb so much - but building as solid a foundation as you can prior to starting can make all the difference in how well you understand the assignments. I used the help desk sparingly, but when I did need it I found it sometimes slowed me down more. I took the route of trying to figure it out myself unless I was truly desperate. But even when you do put in a ticket, there’s a chance your fellows (who just finished undergoing the program themselves) might not know the answer either. In the end, I always managed to find an answer either from fellows or others in my cohort. This wasn’t the case for everyone, though, and a common complaint is that fellows aren’t as knowledgeable as trained instructors. I didn’t share this frustration, because having a background in development has taught me that’s how the industry really is. You’ll sometimes get feedback on what to do, but it’s mostly up to you to figure out how. Overall, HR specializes in fostering this kind of “struggling" environment, and not necessarily one where answers are readily and conveniently available the moment you get stuck. As a result I learned how to form better questions to ask and where to find certain information, both essential skills in any highly technical position.
The second half of the course revolved entirely around group projects. What app to build was entirely up to us. HR did the grouping for us in an attempt to keep skills/proficiencies balanced across teams. It’s during this time I held the most grievances as a student, but mostly due to group/people dynamics which is largely out of HR's control. The silver lining is that learning to work with difficult people is in itself a valuable skill. Another grievance was that there was less structure/accountability in this half of the course. How much you can accomplish largely depends on how motivated/focused your group is, which can also stem from how exciting of a project you choose. As for choice of project, it was entirely up to us. It ended up working out for my groups, but I felt a little too much time was spent picking and scoping a project so that it was achievable in the given time. I wished they'd offered a list to choose from for groups who didn't necessarily have an idea off the bat. Finally, once we did choose a project, I felt there was little staff/instructor interaction. This wouldnt have been a problem except that I had to constantly split my time between project management and programming when I would have preferred to just do the latter.
The reason I didn’t dock any stars is the fact that the HR curriculum is not set in stone. It’s constantly evolving and adjusting based on student feedback, and it’s one of the reasons I admire the program so much. In the time I stayed on as a fellow, I personally saw all my grievances addressed along with any new ones raised by subsequent classes. Instructors (and even staff) began taking more of the project management role, freeing up the students to just code. Also, they began to provide a pre-defined list of projects for groups who didn't want to come up with their own. Regardless, I still came out of the second half having built complex apps from front to back that I could show off to employers and even study before coding interviews. In fact, it’s the proficiencies I gained working with the frameworks for those projects that helped me get hired quickly. So all in all, the group work was well worth it and a crucial part of the curriculum despite the few shortcomings.
Finally, I'd to mention the HR staff. Opinions vary wildly but in the end, I came out of the course feeling like every single person on staff would go miles out of their way to help me out, whether it be the instructors, administration, fellows or hiring team. I could tell they cared and believed in the program, so much so that they'd do their absolute best to ensure you get your money’s worth. But again, much of the work and learning is up to you in the end, and that can affect your perception. When I had grievances about the group projects, the administration took detailed notes and refined the structure for the next cohort. When I had difficult technical questions, the fellows would spend as much time as they could spare sharing what they knew, even if they didn’t have an answer on hand. When I needed general career advice, even the instructors would set up a 1v1 with me and spend hours of their time sharing their own experiences and suggestions. Then of course there’s hiring. I expected that making such a drastic career shift would mean I’d have to start over as a junior software engineer. Instead, I ended up being able to translate most of my experience from the hardware world with just a bit of careful wording on my resume. I was able to land an ideal position at my #1 choice within a couple of weeks of entering the job search. Some of that success was due to a lucky connection, and some due to the extended depth I gained from staying on 3 more months as a fellow. Regardless, the hiring team was in lockstep with me throughout each step of the interview process, helping me review what went well, what to communicate, and even how to negotiate an offer. I tend towards overcommunication as you can tell by the length of this review, yet they were more than patient with me. In short, there’s nothing I learned in the course that wasn’t relevant in the job interviews, and in fact I was able to blow my interviewers out of the water because there was little hesitation answering technical questions.
If you spent the time reading this whole thing, then I can only assume you’re on the fence about undergoing the program. While it’s easy to just say “go for it,” I’d rather suggest that you first separate the questions “do I want to be a software developer?” and “how do I become a web developer”? Hack Reactor will be a major asset in answering the latter, but the former is one you'll have to figure out on your own before you take the plunge.
Though at times imperfect, the HR curriculum continues to evolve, refine, and balance between employer and student needs. The elasticity of the program helps to ensure it’ll only get better in the long run. The first half is overwhelming and will spread you a mile wide and only an inch deep with the intent of providing comprehensive exposure. The second half, however, gives you the opportunity to dig deeper in a smaller set of topics and build practical resume fodder. And all the while, you have a motivated staff guiding you each step of the way.
Overall, the program worked as advertised for me. I put in my all and then some, so I feel like the value received in return exceeded my expectations. I’m now working at a wonderful company in the city I wanted to live in, at a better paying and more interesting position than I had under a year ago. I've successfully shifted my career and am way more excited about where it might take me. I also made numerous connections with both existing and future developers along the way, all who I’m better for having worked with and hope to work alongside again in the future. There isn’t a career goal I set that HR didn’t help me achieve, so it’s safe to say this investment paid off big time and will continue to do so for the foreseeable future.
- HR helps convert hard work into software skills- 12/21/2016Nico Barry • Graduate • Course: Hack Reactor • Campus: San Francisco
I cannot recommend Hack Reactor more strongly to anyone who wants to get into full stack software engineering, but isn't quite ready to get a job yet. If you're able to get into the program, and willing to put in a lot of effort over three months, it's a terrific accelerator.
People may have been different levels in terms of background knowledge or familiarity with coding concepts, but one of my favorite things about the program was how smart and motivated my peers were. A lot of the work in the program is project-based work, in pairs or groups, so having really awesome peers was just as important to me as having great instructors.
I did the program over the summer, when it was still called MakerSquare, and then continued for another three months as a teaching assistant, during which time MakerSquare, owned by Hack Reactor, went through a re-brand process to bring MKS under the HR name.
As a graduating TA, my job search experience is a bit different than other students', since I have more experience (and a few months more of skills) under my belt, so you can take my comments on my job search with a grain of salt if you like :)
As a TA, you start work while the rest of your cohort goes into their "Career Week". Then at the end of your TA period, you join the Career Week of the cohort that's graduating at that time. During career week, you get a lot of help developing your resume, cover letter, practicing interviewing, discussing salary negotiation tactics, etc. Asif was our on-campus outcomes staff member, and he's awesome.
About half of my cohort (which graduated at the end of August) is employed by now. Maybe a bit more; I'm not sure exactly. Some folks get jobs right away, especially if they really hustle (one guy only had one month left on his visa, and got a job offer from a sponsoring company within that time). Of the four of we TAs who "graduated" a couple of weeks ago, I have an offer already, and another one of us is employed (by another one of our cohort-mates, actually).
I'll explain my ratings a bit:
- Overall Experience: It was really fun, challenging, and I came out of it able to build complex web applications from scratch. My job prospects are great. What more could I ask for?
- Instructors: Very smart, and very good at teaching.
- Curriculum: Top notch. The projects were very well designed to introduce us to important concepts we'd need to learn.
- Job Assistance: What I think HR does really well: Giving us guidance about our portfolio; helping prepare us for interviews. What could be better: Doing more to connect us to companies. I can't completely speak to this, though, because my job search so far has been so brief, and so hurried because I've had a very quick process with a couple of companies. I know HR does offer some resources, and I haven't had time to look into them and figure out how to use all those resources. I would have given a 5 score if the HR partnerships team had proactively reached out to me to try connecting me to partner companies.
- Remote Experience From the Perspective of a Canadian- 12/20/2016Nancy D • Graduate • Course: Remote Part-Time Software Engineering Immersive • Campus: Online
I was surprised to learn that there are only a handful of Canadians that decided to attend Hack Reactor. I feel like a lot has been said about the general experience of the program so I thought I will write about my experience in hopes of helping those of you from out of the US whose thinking about attending.
I was very hesitant about choosing Hack Reactor at first and did extensive research before I decided it was the choice for me. I can't speak about other countries, but there were other coding bootcamps around the area I was living that was definitely a cheaper alternative. The reason why I picked HR over these other cheaper and closer alternatives is that the HR curriculum covered significantly more content in a shorter amount of time than any of its competitors (where I lived). If you are looking for a program that's there to push you to get the most done in the least amount of time, HR is the right place for you.
The second biggest thing that I was very worried about was whether the whole remote experience will live up to the onsite experience. Now that I have completed the remote program, I am really glad that I didn't decide to move to SF to attend the onsite class. Not only will you be saving a lot of money since you won't need to rent a place in SF but you will be working out of the comfort of your own home. For me, this was a big plus because I get to stay close to family and attending class just means rolling out of bed 10 minutes before class started! I also really enjoyed the recorded lecture because it allowed me to speed them up, rewind, and rewatch them anytime I wanted. But what about not actually seeing your classmates and instructors in real life? To be honest, I have made some amazing, life long friends that I didn't expect to make. I don't think that strong bonds between people are formed from just being in the same room together.
One thing I do have to admit is that being outside of the US, the amount of support you will be getting during the job search will not be as effective. You will most likely be facing a completely different job market and not everything you learn during job search will be applicable in your case. With that being said, I still believe that technically, HR prepares you very well to enter the job market, no matter where you are from. My biggest resource during the job search has been the HR alumni network, where you can get insight about your job market from HR grads who has gone through it before you.
This is just my prespective on the remote program and it might not be for everyone. I advise you to do your research before making your decision but don't be afraid to take the leap!
- Powerful, peer-driven experience- 12/16/2016Bill Zito • Graduate • Course: Hack Reactor • Campus: San Francisco
Tldr; Hack Reactor provides the curriculum and the right people (motivated and smart) for you to learn web development concepts in pairs and by yourself. I can only speak of the staff in the SF office, but they were both experienced and helpful, although anyone expecting to be a software engineer should get comfortable with directing their own learning (aka not leaning on staff to figure questions out unless you're really stuck).
Going into Hack Reactor (HR), I wanted to learn to code as quickly as possible and to try to get to a top tier company. I chose HR because I know I wanted an intense / all-day everyday experience, and looking on LinkedIn I found that HR had way more graduates at top tier companies (Uber, Google, Facebook, Airbnb, Stripe, etc.) than other bootcamps.
Within the first week of attending, I was very pleasantly surprised by the quality of my peers. They were more motivated and experienced than I expected, with several having graduated with Computer Science or Mechanical Engineering degress, and a couple having prior industry experience. Given that Hack Reactor is largely pair programming with your peers, they made a huge difference in how much I learned each day.
I was also pleasantly surprised by the quality of the curriculum. It provided some direction, while letting us figure out the key concepts via code. In my experience, the only way to really learn coding concepts is to code them yourself, and then recode them. After finishing the curriculum the right way, and reviewing the concepts you didn't understand (by recoding them), you should be able to do both.
When deciding on a bootcamp, it matters what your best alternative option is. I'll lay out the decision in my eyes from those perspectives as well.
1. Bootcamp or self-study?
After having gone through the program, I think that the people and curriculum in particular make a huge difference in the rate of learning. While it's conceivable that you could learn tht much on your own, you would need to be dedicated enough to work 10-12 hrs a day for 6 days a week, find your own curriculum to learn the key concepts, and to have smart and motivated peers to bounce your ideas off of every hour or two. If that sounds daunting, then Hack Reactor may be a good way to get the right structure to learn.
2. Hack Reactor or another bootcamp?
Several bootcamps suggest that they can help get you a job in software engineering. I read up on what the student experience was actually like, and saw that some of the bootcamps clearly had more intense experiences than others, which from my experience leads to more learning. Additionally, LinkedIn searches confirmed that only a couple of the bootcamps actually had graduates working in large numbers in software engineering.
Note: you should expect to get guidance on the job search, but realize that you will not be at the bootcamp for most of your job search, and will need to stay motivated / focused enough to find a job.
- Very productive- 12/16/2016Jace Zhu • Graduate • Campus: San Francisco
Hack Reactor was a truly unique experience and I can't think of a better way to get into programming if you had no background in CS. As a student, I stayed there past 10 PM almost every day because I just didn't want to leave. I was surrounded by very intelligent and motivated individuals and that really pushed me to work harder than I ever did.
If you are unsure about the program, you can message any of the grads on linkedIn and I'm sure they'd be willing to answer your questions. Or you can message me. I definitely don't think it's for everyone, but if you're the type of person that would enjoy going to (winning) a math competition or something, you'll love the place.
- Hack Reactor was an awesome experience for me- 12/14/2016Xiao Zeng • Graduate • Course: Hack Reactor • Campus: San Francisco
I graduated Hack Reactor recently and it was a great experience for me.
I have to say up front, if you are looking for very detailed long lectures on various topics and step by step instructions to teach you how to do everything, then you will not get what you imagined. The whole spirit is to learn by struggling and solving problems and form a logical and systematically way to approach unknown issues like a software engineer. You will spend most of the time working on problems with your fellow students, especially in the second half of the program. Support was provided to guide you not to give you answers.
Also the contents of the program were not the most recent releases. For example, Angular 2 was released recently, but it was not taught in the program because the program only taught you popular technologies that the job market is looking for. In this example, AngularJS is still more adopted than Angular 2.
Overall, you will be pushing yourself to learn the technologies and you will get what you put in. I am very satisfied with what I have accomplished.
- Hack Reactor Experience- 12/14/2016Sam Sherman • Graduate • Course: Hack Reactor • Campus: San Francisco
I really enjoyed my time at Hack Reactor. I was surrounded by smart, hard-working people, which was wonderful. In addition to specific programming concepts and technologies, they taught intrinsically valuable skills such as how to learn a new technology. Now, I'm confident that if I get a job using a technology I'm not familiar with, I'll be able to learn it quickly and effectively.
My biggest complaint is the lack of job assistance. They spend a week at the end of the course giving advice on resume, interview prep, etc., which is definitely a positive thing. However, once the course is over, they kind of just sent me out on my own and said "good luck getting hired". I wish they would have provided some connections to companies or at least give me a nice list of jobs to apply for.
They also made it clear that having Hack Reactor on one's resume is not a huge benefit. Coming in, I was thinking that the "degree" from Hack Reactor would be worth something on its own, but apparently that's not the case.
- Really valuable experience- 12/14/2016Charlotte Willens • Graduate • Course: Hack Reactor • Campus: San Francisco
If you enjoy coding and are willing to work really hard, Hack Reactor will be maybe the most intense, rewarding 3 months of your life. People come into it from all kinds of backgrounds and the curriculum is such that if you can think analytically and put in enough effort, you'll make it through just fine and come out with an insane amount of knowledge and skill.
Also, the people. I've met and worked with some of the most intelligent, thoughtful, fascinating people that I've ever met and I expect to stay friends with them for a long time. As a girl in STEM (I studied math in college and have worked in all technical jobs) there's always a bit of apprehension going into a mostly male working environment, but Marcus stressed on day 1 that any sort of bad attitude toward minorities would not be tolerated, and HR ended up being one of the most fair, supportive environments I've ever worked in. (I say 'worked' because the second half of the course basically feels like you're at a job).
As others have mentioned, there's a technical assessment half-way through that you have to pass to move on to the second half of the course. I think people worry about this more than is necessary. If you work hard to master the material during the first 6 weeks, you'll probably be fine.