I have not hit one personally, but from what I have been told by the golf people I know, is that for the average golfer those weights will not make one bit of difference. I hear mixed reviews on them, but thats the case with almost all equipment. Everyone has their loyalties. I would suggest for anyone looking to buy a driver, that you demo it on a range instead of inside against a net, and even better yet, demo it during a round of golf (you will be more inclined to use your real swing) any courses that sell equipment have demo drivers, and they will let you take them out for a round if you just ask.