I'm surprised only one has mentioned the metal shavings on the playfield from the pop bumper rubbing the lane guide. I bent my lane guide and I thought I had it fixed but last week I noticed metal shavings all over the lower end of the playfield again. I guess the ball has pushed back the lane guide into the pop bumper skirt. So once again I cleaned the playfield and bend the lane guide back. This to me is the only real gripe I have with my game. Just a PITA really.
I've had my game for almost a year and here are the other problems Iv'e had. Crystal ball error and no sound sometimes on startup. Both fixed by a simple restart. Crystal ball came lose and fell on the playfield. Problem is fixed now (not easy). CC around the VUK hole is cracked and chipped away.
All in all I'm happy with my purchase. I didn't expect perfection on the first game from JJP. It's a pinball machine and problems are to be expected.