Professor Li is wonderful! He goes through all the course materials carefully and he explains them clearly. The homework is a little bit challenging and long, so as his midterms and finals. However, they are all doable and you will get a good grade if you try hard.
If you want to get an easy A, this class might not be suitable for you, but if you really want to learn things, choose Professor Li without hesitation!

If you're taking Multivariable Calculus... of course it's going to be a bit difficult. Given that, Professor Li was very punctual in following the syllabus and has a very clear outline of expectations for each lesson and followed them very closely. 50% of the grade was homework, and most of the problems he picked were the hardest ones from the textbook, which was my only major struggle, but they do prepare you well for the midterms and final. While I did not have the best experience with the TA, Professor Li was very understanding of regrade requests and did give me hope for the class. Overall, even though the material was difficult, Professor Li prepared us well!

Great professor. He explains concepts very well. The assignments are well-designed and the workload is not heavy. Exams are reasonable as well. Will take again with him.

Professor Li is a great lecturer from retrospect. The material is appropriately challenging. Definitely recommend this course.