This is for Math132. He is definitely not the best one but he is very clear. Although he made mistakes during lecture and sometime ran over stuff without fully explaining it, he is very helpful during office hour. He knows how to explain stuff and that's what you need from a professor. Also, his tests are really reasonable compared to my other upper division classes, I can say that it is one of the easy upper division you should take. Easy doesn't mean free A though, you still have to work hard to get what you want, just not as hard. I totally recommend him to anyone.