The ball features a hollow metal core and a cover that corrects its flight. How much apparently depends upon the golfer:
“It depends entirely on how good or bad the golfer is. If a recurring problem is either hooking or slicing the ball off the tee, the NDMX ball will make a significant difference according to many of our beta testers,” said Keith Blakely, CEO of NanoDynamics. “Similarly, the ball appears to offer an advantage on the putting green that just might make the difference between an ‘almost’ and an ‘in the cup’ putt.”
In flight ball correction doesn’t come cheap, though. A dozen is expect to cost $60.
I’d like to give them a try. They might help my hook.