I'll jump on the bandwagon here as well. The Jab is a very nice piece. I didn't care for the box finish, so I took mine up to 2000 and added some polish, and I've loved it ever since. The ball is very clean up front and smooth and strong on the back. I find mine to be at its best when the lanes start to open up a bit though it can always be used earlier provided the backends are clean and the volume isn't too long/heavy. Then again, if I were to take it back down to the 500 + Royal Compound box finish, I'm sure it could handle more volume as well. Long story short, the Jab is a very nice ball that can be used on a variety of patterns. If you're thinking of picking one up, I wouldn't hesitate!