Great selection, poor support
Have a thumbs up playlist of over 400 songs. Mark it for download. Days later find the playlist had been silently truncated to 70. Redownload all 400. Days later again find it truncated to 70. Contact support and be told to "buy a second phone to do our quality assurance for us". Ugh.
Brad Beattie about Google Play Music, v3.38.1007