I'd rather not make a huge deal of it, as AN does have a connection with TSFX. N.B. I went to TSFX for many lectures in bio, chem and physics, and this is the only issue I really had.
My problems are (only apply to chem only):
1) She tends to have very little concept of time management and her lectures tend to end up unfinished and 30mins to 1 hour overtime (a bit more of a problem on weekends with poor public transport)
2) Answers to specific questions are sometimes replied with something like "Don't worry, it's out of the course" - even though they are valid questions at times
3) She praises her questions too much

She wrote them and then says "This is an excellent question, very intelligently written, very tricky" before answering each one, it gets annoying after the first 10 times tbh
4) This isn't really a flaw, but I honestly prefer a lecturer that is a little more animated and interactive with the audience
Having said that, the other lecturer is quite good and the notes are excellent.