This used to be fine for buying and downloading my music, while I used Poweramp for playback. In recent months, though, updates have rendered it increasingly useless for that, first by redirecting store links to the main Amazon app, then by changing the download location from the Music folder that any app can access to a subfolder in the Data folder that only this app and Google's Files app can access, so I have to manually move my downloads in order for Poweramp to play them. Poor form, Amazon.