The Amazon Music Unlimited offering is really good, worth the subscription. The app is an amateurish bug-ridden ill-designed mess. The menus are inconsistent from one place to another. Someplaces long press shows a menu, in others it starts playing. Play nukes the current play queue without asking. Exiting or leaving the app for any time wipes the play queue so you lose everything you've built up. Albums go into playlists in random track order. No decent search/sort. Etc, etc...