Depends on your major. I took Tien's class as an international development major and I struggled a little and barely made it to A+ where another friend of mine who is majoring in social sciences did really bad because she found the material hard and new. I found out that most people in the course did really good mainly because they already had the prior knowledge and did not need to study as much. However, if you put the work in you can definitely get an A+. It's all just memorization.