I get some free music with Amazon Prime, but haven't used unlimited sub. There are major problems with the app. If you create a playlist in offline mode, and edit in online mode (or vice versa, not sure which I did), you end up with 2 playlists with the same name and different content, even if you only select downloaded music. Twice I've had all my downloaded music and playlists disappear. There's nothing to select to redownload - I have to start from scratch again. Not sure I will this time.