They engage in deceptive advertising, their apps are not what they claim and dont let them pressure you with short deadlines sales like, hurry for 40% off when itll be 50% the next day. Which is not a great deal as they are horribly over-priced. I personally wrestled with their damn app for days, finely sent off the book with rush shipping (within the by Xmas deadline) only to find out it will not arrive by Xmas. Contacted customer service, who did not care. Didnt even apologize. Ruined my Christmas plans. Will NEVER trust or use this site again. There are other options.