The price of $US4.99 for Phase seems just right considering it's more of a music interaction experience than a complete game within itself. There are a few setup annoyances that suck, such as a necessary upgrade to iTunes 7.5 and syncing with the aforementioned playlist in iTunes. But everyone we handed the game off to really enjoyed their experience with it, so if you're looking for a little time killer on public transport and don't want to turn down the tunes, Phase is the perfect app. for you.