Ball is great for medium to dry conditions, or trashed house lanes. Goes very long, and has a very strong, forgiving finish provided the conditions are right. May not have enough/predictable traction for low rev or high velocity bowlers. I bowl medium speed, high rev, and this ball provides a ton of control all the way through. Took a while to get used to as I had to move about 12 boards to the right to compensate for the distance. Had my first 600 series the 3rd time I used it.
This ball is bad to unusable in heavy oil. Get some decent shots every once in a while, but the ball becomes unpredictable. Skid through the pins one time, gutter next, strike after. Just not worth the effort.
Overall I think it is a great ball on the right conditions. I always had problems putting the ball on the left of the head pin, even with supposedly low hooking balls. This cured the problem instantly. Ton of control, ton of length, but again, not on a lot of oil.