This is an incredibly difficult class. You will learn a lot, but the exams and homework are on a different level. I think everybody gets out with a good grade, but it's gonna take a lot of work. I highly recommend going to office hours for help on the homework, and going to class every day is pretty much necessary to getting a good grade. If you miss a single day of class, you'll be really behind on the concepts because Christou literally created the content of this class, which is unavailable on a textbook that guides you, so he's the only guide. Pay attention in class and do your best!

Class was extremely difficult, but that makes getting a good grade all the more satisfying for this class

Super hard tbh. But also very interesting and filled in the gaps where 101A was lacking. I would suggest taking it at the same time as 101A, which I did not do. Homework is tough and time consuming. If you didn't take 100B with Christou, it might be a bit difficult to adjust to his teaching style. Exams are extremely difficult (there was one where I didn't have a confident final answer for a single question), but he curves generously. Homework is also tough but prof holds a TON of office hours.