I was fully prepared for the stock Titleist golf clubs shaft to be a complete piece of junk, but again I was blown away. The shaft reacts very nicely and while it may not have the right launch properties for everyone, I found that it fit my swing well and performs perfectly in combination with the Tour head. Unfortunately I'm not able to perform any of the number tests on this driver to get spin, launch and Titleist discount, but let's just say that this driver feels noticeably lighter than other drivers currently on the market which will definitely help increase your club head speed.The price on the Callaway Diablo Octane Tour is very reasonable, at anywhere from $250 to $300 depending on where you pick it up. This driver will help you improve your distance off the tee and I highly recommend that you test one for yourself if you're in the market for a new Taylor made golf clubs.