I loved having Cosmin as a TA for PSTAT 8. His teaching style was clear, easier to understand than most lecturers, and although sometimes rushed through problems (due to how many questions he had to cover during section), he would always stay after to answer questions and really try to help you understand.

I 100% speak for everyone in my section when I say this is hands down one of the worst TA in the PSTAT department and the worst I have had. He a arrogant person that wants you to do poorly in his class. Extremely unfair grader that pretty much needs a perfect answer to demonstrate any type of knowledge of material. Avoid him!

The syllabus said we needed two textbooks for this class, but we ended up solely using the free online one and not the physical one we had to buy. There was also a lot of coding, and he graded heavily on this. The class average for the first midterm was a 67%, and a 54% for the second. CLAS helped me more.