Reviews of professor Zhizhen Zhao

Rating: 5.0/5, difficulty: 1.0/5
Don't know about her lecture performance cuz I didn't attend any. Best lecture notes ever seen. Scan though her lecture notes, where significant problems (all in textbook, while the textbook covers a lot more) are selected. And then you can to read the relevant part in the textbook. 
The course is pretty easy for me.

Rating: 1.0/5, difficulty: 5.0/5
No one is able to understand what she is talking about. No background info. No intuitive explanation. Only a bunch of complex mathematical formula pop out without any reason. She basically repeats things in textbook, so I choose textbook as reference and youtube video as my real lecture.

Rating: 1.0/5, difficulty: 5.0/5
Professor is does a very poor job of presenting lecture material. Quizzes emphasize rote memorization over conceptual understanding.

Rating: 4.0/5, difficulty: 3.0/5
I think she does a great job personally. I watch both her and Matus' lectures on the same thing and I feel like she understands more that I'm just a student and need to be overexplained a few topics. 

Don't "avoid" her, give her a chance. Great slides and notes, most topics are covered well.