I had a GB premium. Sold it quite a while ago, actually only after owning it for 30 days or so. Loved the looks of the machine but never really enjoyed playing it. The money from the GB sale sat in the pinball fund for a long while. Then I played Aerosmith premium at the Ohio show. Bought an Aerosmith Le that day from Mr. Trent!! And still loving it.
I also have a Metallica premium and still love and play that game as well. The sparky vs jester they are cousins in my mind!!