Loved this app for a long time, but has progressively degraded. Leaving the app (not just closing) makes it forget its place and forces you to go back and select where you left off (if you remember). Music regularly disappears from my music/Playlists even though it is still available (like it reappears as a new but exact copy). Casting to Echo devices in the house is hit or miss, either not working at all or working for a bit before getting confused and disabling casting altogether.