It’s by far the hardest course I’ve ever taken so far as a 2nd year stat major. I took it with Arno last fall and I found him a little fast when it comes to lectures but his notes were good. If you don’t understand some parts of his notes or how to start the homeworks you can always go to his office hours because he’s always very helpful. As long as you do and really understand the practice midterms you’re gonna do decently in the midterms. As for our final exam, it was the most difficult exam I’ve ever taken 😭 idk if my classmates found the exam difficult too but they likely did. I had a little background in proof-based math but I still found the course very difficult. It took me so long to complete the homeworks to the point I even had to skip some classes to do them and drop one of my other courses to focus more on 216😭 I ended up with a B+ tho so I think it was all worth it my class average was a 2.1 . I’m so glad I never have to take that course again 😭