I've tried three highly-rated Music Player Apps on my Acer A500. Now I'm using "Doubletwist". The problem I'm finding is the track order is wrong, which is especially bad with an album where the tracks are designed to be played in a certain sequence (plenty of them). They aren't numerical, and not alphabetical. The sorting makes no sense. Yet some albums are listed correctly. It's not just happening in one App. All of my albums work great on my other dedicated (Non-Android) MP3 players -- they always play in the correct sequence. I'm ready for a suggested App that definitely holds the track order, no funny stuff.