I have played them in the 910 series of driver and fairway woods, and also in the 913 series. Smooth feeling, great launch and spin numbers for my swing. If you were fit into them, or liked them during your demo, then nothing should stop you from playing them.

I have these shafts in all of my woods(910s), and I cannot say enough good about them.  I tend to have a very quick transition and a fast swing and these shafts seem to hold up very well for that type of swing.  My miss is getting steep, and when I do hit down on the ball the flight does not balloon anywhere near other shafts I have tried.  My buddy has the ad-di in his 913 and we both hit my 910  with the project-x further than his set-up.