This guy can make even the most simple concepts seem extraordinarily complicated. He is one of the most confusing professors that I've ever had. If you take his class, I would suggest subscribing to Khan Academy or some other learning platform where they will actually show you how to solve the problems rather than skipping straight to the answer with no further explanation.

I’m not sure why there’s lot of negative comments because Wu was a great teacher. He constantly asked for student feedback on how to improve and had a Piazza discussion page where he answered all questions. It also helped that his TA William Chang was amazing and super helpful. Wu’s lectures were straight forward for the most part and his homework was super easy. His midterm and final were also questions from the notes and homework so as long as you studied using those you should have done fine. I basically self studied using his lectures and found it to be really easy to understand even though J had never taken Calculus.