Let me start off by saying that Bertello is really not that great of a lecturer. I did't understand a lot of what he was talking about in class and it seemed like no one else did either. That being said, his homework assignments don't take much time (about 10 problems on Mastering Physics each week). He gives a decent overview of what is going to be on the midterm and final before he gives it so there aren't any surprises. It's not too hard to know what study for the test, as long as you give yourself enough time to teach it to yourself, because you won't learn much in lecture. A lot of the problems on the exams are similar to the homework problems or the other examples in the book. Also, he is a pretty nice grader and gives you a slightly better grade than other professors might.