App issues: 1. Won't download purchase in location other apps can find. Also play queue: Add something to play next, doesn't take. 2. Running shuffle and want to see what's next without changing any of the random tracks, nope. 80% of the time it has lost its place & also won't scroll thru past or future tracks w/o glitching. 3. Re. the 1000s of tracks you already own, Amz won't make it easy. U can only search online music, not tracks downloaded. 4. Even if Prime mbr, get ads. Modern Amzn sucks.