Reviews of professor Yang Liu

Rating: 3.0/5, difficulty: 3.0/5
Doesn't speak amazing English. 
Can be hard to understand.

Rating: 5.0/5, difficulty: 3.0/5
He has an accent, but if you concentrate well enough, you'll get it. It's really not that bad.

His examples are pretty straightforward. He gives you a handout every meeting and explains the reading material well. His homework is 25%, and three major exams are 20-20-35%, respectively. Some formulas are in the test. Focus on the homework.