Prof. Wang was new to the IEOR department, and as such, he's definitely pretty in touch with the students. He has some very kind policies like dropping the lowest 3 homeworks and giving extensions when the class asked for them. While his lectures weren't amazing I definitely learned the material through the problem sets, which consisted of 2-3 questions from the textbook and then 2-3 more challenging questions, some of which involved programming in R. The two midterms were both difficult but you were given 24 hours; the final was much more reasonable, but you only had 4 hours. Overall, I definitely learned a lot and appreciate his kindness and flexibility. IEOR 3658 and this class will definitely help you a lot more than STAT 4001, at least based off of what my CS friends who took the latter have told me. There was no curve in the class but I believe roughly 30% of students ended up with A-range grades.