Titleist R&D Team, Last spring I started changing my Callys to all Titleist. I started by getting fitted for a 915 D2 driver. I had already bought a new Scotty Cameron dual balance putter earlier. Then I started replacing my 913 fairway and hybrids with 915's. Finally I had the club pro help me get the right irons which ended up being a set of 714 AP1's. Before I made the change I was happy with bogey golf. My average score last year was 96. So far this year, after 120 rounds my average score is 89 and trending lower. The confidence is thru the roof!!!! Yesterday I had two birdies on the front side. Before the change I'd be lucky to get two birdies in one month! The new PRO-V1x ball is beyond compare. The accuracy is "super" and the feel is unbeatable. THANK YOU for creating such a great product!!!!! I'm sold for LIFE!!!! steve b