I caught Caseys review of this app on App Advice yesterday so I was able to buy it on its first day in the App Store. Ive already played through a couple hundred questions so I guess I can say its addictive. The questions vary a lot in terms of difficulty, or maybe its just that Im an old school Mac fan and know more about the Macintosh and System 7 than the various models of iPods. Needless to say, I learned something with almost every round.