Yaroslav is a knowledgeable professor and I learned a lot of important physics in the class. He is, however, a lackluster lecturer, but if you read the textbook, you'll be able to understand whats going on 99% of the time. His tests are very reasonable and he pulls a lot from the textbooks and homework. Sometimes there is time pressure during the tests. Although the averages were in the 50s and 60s, I think it's due to a lack of preparation. The homework was 4-5 problems from Griffiths and the pace was on the slower side. The lectures were mostly beneficial for a more philosophical understanding of quantum mechanics and his notation was at times difficult to follow. I would highly recommend this class though and Yaroslav is a funny guy.