115A was my first upper div Math class at UCLA, and I felt very lucky taking it with Dr. Wink. He gives detailed explanations to the proofs and really tries to make students understand the content. Sometimes he goes over the materials a little bit fast, but he is very helpful after class/ during office hours and would explain a long proof all over again until you feel okay about it. Quizzes are easy and you get full points for the homework/ quiz section as long as you get 75%+ in homework and quizzes combined. Homework problems are short (compared to 115A with other professors). Midterms and the final are pretty straightforward and similar to the practice problems (he has a very generous curve (A for 85+). One suggestion would be to take good use of his office hours and really try to understand the concepts and proofs.