I just received my GB Pro and have been putting a good number of games on it. The game is incredibly fun, but it is hard. I don't mind getting kicked in the nuts every now and then in a home environment, because it's easy enough to just press the "Start" button again. The shots are great and different from most other Sterns. I don't really notice the flipper gap. I'm very happy with the purchase.

I added a $20 airball protector day 1 and had to make a minor adjustment on Slimer. Other than that, the game plays perfectly. I've had to make small adjustments like this on all three NIB games I've purchased from Stern. No biggie.