Hello! This is what I used exclusively for content review for Biology/Biochemistry, Chemistry/Physics and Psychology/Sociology. I only had 6.5 weeks to prepare for my MCAT, and was looking for very strategic content review. The tutors spent the time to look through each bullet point of the AAMC content guide when creating the powerpoint presentations with audio lectures. Thus, the content is 100% tailored towards MCAT. This is the difference. Crash Course and Khan Academy are amazing, but their target audience is not specifically MCAT test-takers. The result, study smarter, not harder. PM if you want more details.