I've got 3 RipRs. I am waiting a little while to add reviews til I get more games on them.  I throw the ball fairly hard (16-18 mph) and normally play 15 at the arrows to 8 at the break point.  The 4000 grit oob finish didn't work for me because it was too over under. I took the finish down on the and made them much more usable on more conditions.  

80/4/40 p2.5 (1500 surface) - this is the suggested late break point drilling with the in box drill sheet.  This ball gets really good length and flips pretty hard. At 1500 grit it is still able to get down the lane and have a lot of backend. It seems to gain another board or two right before impact. I leave a few 7s (im right handed) and a few 9s.

35/4/75 p3 (2000 surface) - this drilling puts the pin below the ring finger and gets the ball rolling quickly. This gets me a more mellow backend reaction. I cover about the same amount of boards as the above drilling but it's much more of an arc.

55/4/30 p3 (2000 surface) - close to a double thumb drilling for maximum hook. This out hooks my 60/3/30 p2 (500) and 55/5/25 (500) Manias.  It out hooks them by 3-4 boards and they're much more snappy. Both manias have a banana shape.

The RipR has the length of the frenzy, backend of a craze, and the ability to handle oil like a mania or LevRg response.  Morichbowling.com has great videos on it comparing the balls with similar drillings.