Edit: The offline feature is a bit buggy. It displays two tracks when I open up an album outside of offline mode. Also sometimes some tracks do not want to play. Please fix.
I started using this app for the last.fm scrobbler. Now its getting better with every update. I was very pleased to see the app syncing all the music from my google account with the latest update. I will never go back to googles app now.
P1tseleh about gMusic