I took this class after already taking 115a with Heilman. The course by itself is amazing and I would recommend it to anyone who wants to learn about analyzing games and situations. Heilman is a very straightforward lecturer. He provides typed up LaTeX notes ahead of time which make it very easy to follow along and review something later if you're having trouble. He has a bit of a dry wit and will crack a small joke every once in a while but it's mostly just straight lecture. I think he explains everything very clearly and all of his proofs are very in depth. He makes sure that everyone is following along and will answer questions but there usually weren't any because he is so clear. The midterm had a very difficult question on it that no one got right so he went over it in class and gave the solution then asked it again on the final. Overall, I think Heilman is a great professor and would definitely recommend him for this class.