[potater]

Oh man, the OS X integration utility is remarkably obnoxious. I wasn't pleased that it was getting a bit more into the guts of my system than expected without letting me know (although the system authentication request at the beginning was clearly a tip off, assuming I'm remembering correctly). After completing the install I suddenly had a Google Music menu icon and the app was accessible only through my system prefs pane. I much prefer Amazon's approach with their standalone application.

I've also had issues where the app wanted to completely reupload my entire library. No thanks---I now just keep it set to monitor an empty directory.