I've purchased an e-textbook from this company. It worked alright on the computer but it's practically crippled when I access my books on my iPad. For some reason the *** app for for my iPad either crashes constantly or keeps logging me off, whether I have Internet connection or not. It took my twenty six times to get back in. The price is not a major difference compared to buying a used textbook. it was only about $10 cheaper. i only got it because I thought it would be more convenient. turns out, i had to go through a lot more than what i would have if i just gotten an used textbook. I'm never going to purchase anymore textbooks from them anymore!