I have one and think it is a very solid ball. I bowl on a 2nd shift scratch league. Mine is drilled, pin under,about 4 1/2 x 1 1/2. Comes out to like a 65 degree angle on the CG. I used it first night in the OOB condition, front 10 then I left 4 pins and splits till I put it away, in the middle of game 2. Shined it up for the next week, 798. It got a little longer before it made it's move to the pocket, but only lost a small amount of hit. A bit more angular when polished but still basically a smooth roll into the pocket. The cover seems very adjustable to whatever you want it to do.
FYI - I am RH, throw about 18.5-19.5 mph, med - med/high revs (Sorry don't know the actual RPM).
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Jorge300
"Some time, when the crew is up against it, and the breaks are beating the boys, tell 'em to get out there and give it all they've got. And win just one for the Zipper. I don't know where I'll be then Doc, he said. But I won't smell too good, that's for sure."