I gave one star rating but in reality, there should be STAR MINUS. I subscribed to this service last year at the beginning of the semester. I thought it would be helpful for my online classes. It wasn't. I went into the system and canceled, then got an email 11 months later telling me that they were about to bill me again. I went back into the system canceled AGAIN! I doubled checked that my subscription was canceled. I try to login with my email. The email was not recognized. I thought I was in the clear. Nope. I just got an invoice saying that I was successfully billed. Calling BBB and anyone else I can find on Monday. Furious.