if you're a pre-professional student and absolutely have to take physics 2001, take chastain. office hours are basically like an open forum in front of a white board for 2 hours, where students can ask him to work any problem (including those from homework). i have to say that the worst part about the course was not the exams, but the homework, because some problems were harder than the examples worked in class. additionally, homework is due twice a week, so you will be on your toes. if you go to lectures, understand the examples worked in class, and take advantage of the tutoring center/office hours/SI sessions, you can get through the homework though. for the exams, understanding the homework and fundamental concepts is critical. i didn't find any of the exams particularly hard, but the class averages were always very low (50-60) most likely because each question was worth almost 7 points and we were experimenting with computer based testing - the mastering physics program (not the best for physics in my opinion). after the midterm, the physics dept decided to test us via scantrons in class though due to their failed experiment w mastering physics testing.
chastain himself is very laid back and has a great sense of humor, which made going to lecture regularly easy. he genuinely cares about whether students understand the material and wants to help.