Logged in once, had a quick play. Couldn't find a box to search for artists/songs/albums. Exited app. Went to log back in, doesn't save password.... Typed in again and box crashed
Rebooted and this time it recognised me (no login required) however box crashed again
Visually it looks ok, and presuming there is somewhere you can search then it will be ok as an app, however I can't ever really see me favouring it over sonos if I want to listen to music