Becky Tang
Prof. Tang is very knowledgeable and works hard to provide guidance to all of her students. That being said we covered material very quickly and exams were very difficult in my opinion. If you're good at math and want to learn R, I'd say take the class. She is also very punctual, so make sure you're ready to wake up for every 8:15 and be on time.
Exams were very difficult, and there was a lot of homework and problem sets that took a long time. The final project was pretty fun, and I did have a good understanding of R by the end of the course, but material was taught very quickly and fast understanding is expected.
I learned a lot from this course. The instructor was very supportive and approachable, and had a fair amount of workload. However, the tests weren't always of the difficulty I would expect. It required a substantial amount of understanding (if not complete) of the concepts that we have gone through in class.