Meng is really an okay professor. Her lectures are very technical, which makes them a bit hard to understand, but she does try her best to go with at least some conceptual intuition. Her exams are indeed difficult, without a curve, but I wouldn’t say they are impossible to do well on. Read the textbook, understand everything from the core, and practice the medium-level homework questions (her exam questions are around that difficulty), it should be still okay. Personally, I like Meng a lot. If you ever try to approach her, she is a positive, sweet, and welcoming person. There is no pressure at all when talking with her, and she tried to help you when you need it. Overall, I would take the course again in a quarter when I have all other easy classes (if you plan to take it, consider your academic workload and the overall difficulty