this class in particular was my kryptonite because even though the material itself is easy, the way Professor Liao teaches is just not great. i ended up not going to his lectures and only his office hours and ta discussions because i would often sleep in his class. the midterm was easy but the final was just a dumpster fire. i suppose it was to balance the class averages from both exams since the midterm's average was pretty high.

overall, i would rather take a different professor than him but if you find ways to self-study, you should be fine.