1. Top-notch lecture quality (After taking about 50% of the lectures, my perspective on problem-solving has truly shifted. I'm excited about how much stronger I'll become after watching all of them.) 2. Lecture materials and lectures are updated very actively. 3. Student questions are handled exceptionally well; it makes you wonder how they manage to answer so many. 4. Good voice. 5. The jokes sprinkled throughout are somewhat funny.