The 4.0 update has made a ruin of what was a pleasant app. Had to redownload all my unread books, library sorting is insanely convoluted, smart list is gone completely. Searching and browsing comics has become a huge pain because there is no longer any way to just look at the new release list for any given week and it's no longer possible to simply browse by categories like genres and publishers. If I didn't have so much wrapped up in books I haven't read yet I'd probably uninstall.