I just bought it. The physics and the way the screen window follows the ball are indeed well done – it just feels right. You can even shake the iPod to push the table. Didn't get it to *tilt* yet, though
The UI around the game is a bit lacking, indeed. E.g, a the end of the game, when you get to enter a nickname, it would first not accept it, without telling me why. I could not get ahead. By trying I found that my orginally chosen nick was too short – a longer one got accepted.
The game is ideal to fill in for a minute or two of idleness. Need no practise at all, provided you've ever used a real pinball machine before