I agree with what has been said before. Today most balls are: good, or condition specific. very seldom has there been a "bad" ball.
As of 3 weeks ago, I would have classified the response as useless ball, I've seen about 18 bowlers, different styles, from crankers to strokers to spinners, on wood and on synthetics using it. No one was successful. They did not necessarily shot bad, but they were in the mediocre level (scores). But 3 weeks ago I saw a lefty do good with the ball, so how do I rate it now? It is VERY, VERY, bowler specific. Personally I think, that is a worst rating than lane specific.
Another example, I was looking for a strong pearl. Members of the site steered me to the Savage pearl. I could not get it to work on our house shot, and everyone was telling me to junk the ball. But in a certain league with a shorter oil pattern, the ball was a control/power beast. Even starting up early (drill was stacked, Pin about 3" from pap), the ball would still finish strong enough to carry. And if I sent it out too wide, the light hit would swish everything out of the deck. So is it a junk? Nope, just condition specific. I later found out that the lanes in the States are usually oiled shorter and with srontger backends than what we have here.
regards and sorry for the long post.
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DARK BEER IT IS THEN!