I had a trial of Google Play before I went ahead with Spotify, no dedicated desktop app was a real dealbreaker for me. You have to play it through a browser and the playback quality is compromised when you refresh other tabs, a horrible clicking sound all the time, I can't be dealing with that when I'm working. I didn't find the interface anywhere near as intuitive either, also not as easy to discover new stuff, no collaborative playlists, not really possible to search for playlists, for the same price I found it a far inferior product. I believe their Android app is far better than Spotify's offering but that doesn't affect me.