I've played a 910 D3 since 2011 and it's been the most consistent club in my bag. I got new AP2's this year (upgrade from 710s) and have seen a nice boost in forgiveness and playability. Given that I went to the 917 demo day at my club and hit the 917 drivers and fairway expecting small incremental improvements in numbers from what I had with my 910's. I was pleasantly surprised with an added 4-5 mph in ball speed and 6-7 yard in carry with the new 917 D3, and a nice tight ball flight. Very workable, and forgiving. The grey look is awesome and the sound off the club is pure. So pumped for the new arrivals.

I also have the 910 D3 and have loved it since I got it. However, it is no comparison to the 917. I understand your complaint about ball flight being lower and not feeling as if you hit it farther. If you get on a trackman, you will see the difference and can always play around more with the weights and degrees. I was hitting it lower (based on look) but my launch angle was the same and the spin rate was much lower. All in all, I gained about 20 yds of carry with the 917 plus roll. Highly recommend getting fitted and seeing for yourself the numbers. It is truly a massive upgrade on from the 910.