I actually took Amar for MAE 105A, but the option wasn't listed above. Anyway, the class was very fair. There were 5 pop quizzes, no midterm, and a final. The questions are all very straightforward, ie not tricky, but you need to have the right idea about how to solve the problem or you won't get much partial credit. Also the final was 5 problems long, and they weren't too bad. Amar explains concepts really thoroughly so everything that shows up on his exams is very doable. Lectures can be boring (and if there are pop quizzes you can't miss classes), but I'd recommend him! And go to the discussion, both TAs were really good.