I love Coursaver. My university's physics department is a joke, so Chad's videos just saved my life. After just the first "day" of videos (5 of them) it fixed stupid problems with my foundation that my Kaplan instructor couldn't explain in a way I understood. And I went up 2 points in PS coz of it!!!!
Besides, if you're willing to spend 2k on a prep course or 300+ on books, then $20 a month for any-time-you-need-it review on both chems and physics is worth it.
Seriously, I've had the dumbest issues with pulley & incline problems, and I finally get it. I want to send the CS guys a box of candy.