It takes a while to get enough points to redeem for a gift card, but it doesn't require much effort. This website is a nice way to pay for your coffee and it encourages you to make more organized notes. Also, you would take notes in class anyway, so why not upload them to help out your peers? In addition, when you organize, review and simplify your notes prior to uploading, you're gaining a better understanding of class material.
Bottom Line: Yes, I would recommend this to a friend