Roto Grip Blue Grenade Bowling Ball

I felt the need for a urethane ball, and I found this one for 15 bucks on EBay, so figured what the hell. Got it drilled with about as much oomph as it could muster. and shot a smooth 660 first night out. I don't throw it regularly, but nice to know that it's there, and I can apparently score with it. Like I said, it will marshmellow without really hitting it, but I don't usually have much of a problem there(read my profile). I did like the rarity of it, as it doesn't have the notoriety as a Black or Blue Hammer. Overall, a good choice I think. 9 out of 10.