As a graduating senior, I can confidently say that he is my favorite professor from UCLA. I took Psych 135 and 137C with him, and I absolutely loved both of these classes. He is a great lecturer, no doubt about it. Honestly, I am not sure why people complain about his tests so much. I agree that his tests are not on the easy side, but they were NOT terribly difficult. As long as you understand the concept from the lecture and read the textbook, you should be fine. His tests are not meant to measure how good you are at memorizing definitions of concepts; they ask you to understand the concept and apply it to situations. I got A and A- from his classes. If you try, A is definitely in a range. Not an easy class, but very enjoyable and worthwhile.