This website may or may not work at the time you're reading: http://www.math.ucla.edu/~thomas.sinclair/3b.2.13s/
Useful to get an idea of the class if it still is.

Sinclair may or may not change how his class works (he said one year he collected homework assignments instead of quizzes).

Nice guy, thought he was a student at first because he looks young.

Midterms and final were easy said no one ever. After every midterm and the final, I'd walk out thinking I'd fail the test (and then finding out I didn't fail so badly or did well was always nice), and apparently, so did everyone else around me. His tests are the tests that you'd put down anything and everything you know on the paper to give the TAs any excuse to give you a point. Solving integrals isn't just it either. There would be a problem where you'd have to remember the definition of some theorem or so. But, like someone said, he curves generously.

I really liked Professor Sinclair. Although his exams were difficult, as long as you understood the material, went to OH, and reviewed homework problem you could get an A in his class. He is a very conceptual professor and cares a lot about his students. He is also very approachable and always willing to help and answer any questions. He gave weekly quizzes, but as long as you did the HW and understood it you could 10/10 on all your quizzes. He had 2 midterms and 1 final, they are hard, but like I said if you understand the material you should do fine, plus he gives a generous curve. That being, said if you put in the time and effort and not simply memorize everything you should do fine and get an A!

Dr. Sinclair is a very humble and approachable guy. I wish that I went to office hours more, but his office is just so cramped... that might be one of my only complaints. That, and the fact that there was no video podcasting (which would have helped tremendously when reviewing material). Other than that, he is a good professor. He has a very good handle on the material and purpose of the course. I got the impression that he cared a lot about us and tried to accommodate us whenever he could. I never thought that his exams were too bad, despite what everyone says. Doing well on them just required a deeper, more conceptual understanding of the material.