I am fairly happy with playster. I wish it kept better track of the books I have read. Not every book I have read is listed. I also think it would be helpful if you delete the book out of your lineup after reading, that there was a way to tell you have already read that book when your browsing at a later time. It is difficult to search for new books. Searching by author or by book doesnt always work. I have to uninstall then reinstall quite a bit it seems like.