Since I upgraded to iOS 8.4 on all my devices (iPhone 6+ and Mini 3), I have so many problems using the Apple Music app: 1). Playlists created in iPhone 6+ synced with my MacBook iTunes, but not Mini 3. The reverse is true. I only have 3 Playlists and 20 songs total. 2). I created a playlist, put some songs, and select "Make available offline" on the Playlist. After a couple of hours (I only put 10 songs on that list), only ONE song was downloaded (iPhone icon next to the song name). If I put my iPhone in Airplane mode, NONE of the song is available since it was not downloaded. I have to keep doing "Remove Downloads" and then "Make available offline" like 3-4 times before the downloads will stick. 3). I searched for a song, found it and select "Add to Playlist" but it was not added to the Playlist, even though I see the "checkmark". I had to open the Playlist and search and add the song from there --> Playlist --> Edit --> Add Song. Yes, I did all the obligatory sign-in/out iCloud, reboot and reset. I tested this with 1 other iPhones and 2 iPad, all exhibit the same problems. I created a new iCloud account, same problem. Right now no. 1 above (no syncing of Playlist among multiple devices) is one I haven't been able to solve. Anyone have any input on this? Right now I am using Google Play Music until this is sorted out.