I just finished putting this drill on a Columbia 300 Reaction Roll (solid particle). My experience confirms the comments in the thread. Ball revs up nice, tons of midlane and then lays off really well at the back to keep from over hooking.
Mine has the pin about 1.5 inches below the thumb but my first 1-2 oil lines are still over the thumb, and I usually don't have anywhere close to an issue with clipping the holes. So pay attention to your pin/thumb distance.
My take is that it would be very useful for heavily oiled lanes, a heavy THS or for people with fewer revs than I have. I doubt I'll be using this ball much at all due to the (lack of) oil volumes I usually see.
I might try this drill on a less aggressive ball in the future, but I can see how it would give the impression of being a dud on a ball with too weak a surface. If you throw it through the mids there isn't going to be much recovery left on the back.
Jess
