This class was a lot of fun, even though I'm not super interested in cosmology! Professor Turner was a very engaging and funny lecturer and he has lots of really cool stories to tell about physicists he knows. His midterm was pretty long and a bit confusing (avg. was like a 55), but his homework was definitely doable. He assigned a final problem set instead of a final exam, which was "open-world" as he called it, meaning you could use the internet/textbooks but just had to work on it by yourself. I thought it was quite fair with that and it really saved my grade in the end. I'd definitely recommend taking this class with him, he's got a lot of very interesting insights on cosmology!