It was sorta in the middle. Most places thought it was pretty cool though.
Myself, I grabbed the game in one of those two for one sales that Toys R Us had from time to time before my local one closed, but then like an idiot never actually started it up.
Metroid Pinball was interesting. The thing that bothered me was tilting the system was controlled through the touch screen, but you needed both hands to do the flippers. It was awkward to try to use your thumb to get to the touch screen or stop using one of the buttons and do it with your hand. They really should have just set it to the shoulder buttons somehow. The game itself was pretty cool though... just about as cool as a pinball could get really.