1. The course is not yet complete. (This is the biggest problem.) - That's probably why it's unlimited. Hmm.. - Wow~ When I gave it 1 star, it wouldn't save. I have no choice but to give it 2 stars. 2. The teaching quality is excellent. 3. The content up to lecture 132 (chap8.1) covers high school geometry, matrices, and vectors. - If you paid good attention in high school geometry class, you don't really need to take this.