If it's not the absolute hardest course you've taken, it'll be one of the hardest courses you've taken. The workload is staggering. At an Ivy League University you'll have an entire semester + winter break to write a compiler. Here you'll have three weeks. Buckle down & get ready to work hard.

A fascinating and incredibly well-made course. Check out my Medium article as to why you should be taking this course: https://medium.com/@seandlg/what-nand2tetris-has-taught-me-about-computers-and-more-importantly-about-learning-aebc84af3030

Challenging but rewarding.

About a year ago I started mucking about with code with the aim of becoming a web developing. I started with front end and could get away with knowing next to nothing about how computers actually worked and the big software picture. As my interest grew however I quickly became dispirited because I just didn't know enough about what was really going on. Now I no longer feel like a fraud teaching myself code. This course was everything I was looking for.

My only criticism would be the last project. My implementation of the operating system classes passed the tests however it turned out I had let in some really stupid bugs which the tests didn't pick up. This led to easily the most frustrating part of the course as I then discovered most of my classes were incompatible. After the best part of another's weeks work, and several submissions later, I got full marks on the final project. That being said it is probably very difficult to test everything as the classes leave a lot open in terms of implementation.

Thanks a lot. It was a great course.

I'm a 13 year old 8th Grader from California. I loved this course and learned a lot! Thank you Mr.Schocken for putting together such a wonderful course! It was a thrill to finish the course finally!

A true gem!

passionate professors!

Best ever computer science course I've taken. Though it takes me 7 months to complete both parts, it really worth it!

The best course ever.

Understand computer is difficult, but this course can help you on this point.

This course has been brilliant. I expected to learn a lot, but I got so much more out of this. Its incredible to see such a powerful machine coming out of such a simple design - a true mark of elegance.

Excellent, challenging course. Learned way more than I expected!

Great, highly recommended.

What an effort by the teachers! Such complex concepts simplified for a large and varied target audience. I thoroughly enjoyed doing the exercises for this course. I am eager to take up the part 3 whenever it comes out.

splendid

Great course! Together with part1, it goes through how a computer does what it does, but in a simple way. That is not to say it's not valuable, it was very cool to see how things work behind the scenes and how they did all that! Best course I've done!

As great as the first part, although far more demanding.

It was a bit superficial. Homework helped to practice the basics. I prefer more detailed and more deep lectures.

One of the best computer science courses I ever had. You start understand how actually things like heap, stack, etc. works.

Overall, it's an excellent course covering a lot of concepts, definitely the best online course I have done so far. The latter weeks are quite overloaded though, I think it might be better as a slightly longer course, with an additional week focussing on the VM language and the use/history of the stack and heap distinction.

Great course

Thank you so much Shimon Schocken!!

Part two was tough, but it was very helpful.

This is a brilliant and very challenging project oriented course. Even as a IT professional doing this course for fun the workload can be very demanding. Be prepared to work hard and for long hours to get through this course. But the tremendous feeling of accomplishment at the end makes it all worthwhile. I have not felt this way since my undergraduate days. Thank you for reigniting my passion.

Absolutely phenomenal. One of the best and most instructive courses I've taken. This provided a much deeper understanding of computer internals than I'd previously had, and I'm shocked by how much ground was covered in this course. It took a lot of work, and while it is listed as 'beginner', I imagine it would be quite challenging to complete without having any experience programming.

Very well structured, you learn a lot, primarily by doing, which is the best learning. The project where you program in Jack is in my opinion unnecessary, and the OS part is just a bag of random stuff, but overall, one of the best courses out there.

Great course! Cannot imagine how can I build in two weeks the whole compiling software that translates an OO language down to machine code! Although the part II needs more work than part I, it is still manageable and equally inspiring!