Professor Williams is a phenomenal guy. He puts a lot of efforts in explaining the concepts and try his best to make everyone understood the lecture. He often uses interactive methods to explain the dauntingly difficult topics. The class had 5 HW assignment (somewhat difficult but late submission was allowed), 3 quizzes (Easy), and a review paper (on any topic related to QM) & short presentation.
I couldn't score well in the class due to personal reasons, but he graded leniently. Overall, the class was informative and engaging even to somebody like me who had no prior experience in QM. I would highly recommend this class.