I have two BW's. One is oob and the other I polished on a spinner using Black Magic polish. I'm averaging 243 after 5 weeks of league with the oob BW. After league last night I tried out the polished BW for the first time. Result: 300. It gave me the perfect combinatiion of length, continuation and hard arc (not snap)that one would seek after the lanes have transitioned and broken down on a THS.
I was looking forward to the pearl bw but for now polishing the solid up is a good alternative.