This can be considered as a general comment for the entire 102 series taught by Professor Wu. I had A-/A/A for 102A/B/C.

To start with, Professor Wu is a really nice person, he often jokes in class and answers whatever questions students have. Having taken three classes with him, I guarantee you that he really likes teaching, and he is in fact one of the few Professors in the Stats department who wants to teach you something...

As for the class, I have seen many negative comments on Bruinwalk, and I was also worried at first, but it turned out to me that it's an easy A as long as you pay attention in class, read through his notes, do the homework by yourself, and perhaps ask questions in OH. I got A- in 102A bc it was online and I didn't really attend the classes much...

He focuses a lot on mathematical (or theoretical part of) statistics, so you will see lots of derivations, proofs and the math heavy stuff in his class. If you don't like the theoretical part of statistics, then you probably will suffer in Wu's class, and I would highly recommend you to take Miles Chen or other professor's classes instead. However, if you plan to pursue a graduate degree in statistics or go for academia or really want to master statistics, then you have to learn these stuffs and taking Wu's class will be truly helpful. I personally likes the theoretical stuffs he taught, so I enjoyed...But if you aimed for practical application alone, then nope, it's gonna be a nightmare like the other comments have detailed.

In general, I feel like the stats department divides into two tracks (application and theoretical) based on professors. Christou, Wu, etc. are extremely theoretical based; whereas Miles Chen, Lew, Mike, etc. favor application of statistics. (just some personal opinions...)hope helps