To put it very clearly, this app caused my iTunes to spontaneous stop working after I updated from Snow Leopard to Lion. After hours of talking to Apple Support my iTunes library had to be completely rebuilt and I had lost a lot of my metadata (number of times a song is played, last played, etc). We narrowed down the possible sources that could have caused my iTunes to compeletely stop working and my corrupted data and the only thing I recently changed prior to updating to Lion was the addition of this app. I have since uninstalled the app. I have my iTunes metadata (playlists, etc) for over 6 years and because of this app I lost my data. I could not be more disappointed in this app.