This class was really enjoyable, one of my favorites in the C&EE department. Professor Peng is a great professor and really cares for her students. Her slides and lectures are well-organized and easily followed if you pay attention and utilize the course reader book. Homeworks are tough, so it's helpful to get some old homeworks to reference. The tests are reasonably challenging (open-note) so make sure to study well for that. If you put in the effort, go to class, and study the course reader well, this class should be fun and not too difficult.