I took Physics6A with Fitzgerald. He is a good lecturer I admit. But his exams are extremely hard. And they are not at all predictable. Some times you see like one question in the exam that's the same or similar as his sample exams. But his exams are soooooo challenging. And his homework and sample exams don't prepare you well for them. The average for the final exam was like 56%. And his curves don't do you any favor either. Apparently he inflated the curve for people who got below a C- after he realized he failed too many people probably. But this is a very difficult professor. Don't take him if you don't want to have a hard time and a poor grade, unless of course you are a natural in physics.