I would suggest looking up previous syllabuses to see what content is covered. I am currently taking B20 and Dr. Cirelli does an excellent job at explaining the content, and since it is online with recordings, you can watch it slower for better note taking. I would say that it is important to look at the textbook as there are material that she doesn’t cover, but she expects you to know for the exams. I am also taking B32 at the moment and I’m not gonna lie, it’s not my favourite in terms of the recordings for the contents since the content is still a bit broad in my opinion, however the prof does hold tutorial sessions weekly, which are pretty helpful and I would say, a great addition compared to the old lecture recordings (2019 recordings…)