I was lucky enough to travel to Texas from Indiana this last weekend and get my new 910D2 into play.  All I can say is wow!!!!!  I hadn't touched a club since November, so I figured I would be a little rusty but felt pretty good after taking a few swings on the range.  I am left handed and picked up the 910D2 with a stiff flex Aldila RIP shaft with a D4 setting.  One swing and I knew I didn't need any adjustments.  Hit a little cut about 275 off the first tee.  Previously I probably averaged 270 off the tee.  All day long, I hit drives from 275 to even a couple around 300-310 (downhill, downwind LOL).  I am definitely a lot longer with this club.  All I can say is this driver is awesome.  I love everything from the sound at impact to the feel of the club.  My misses were minimized and shots that missed the sweetspot still took off.  I had a medium trajectory with the Aldila shaft.  This is what I prefer but will probably have to suffer a little bit during the wet conditions here in Indiana during the spring.  I will probably look at another shaft though to get me through that.  If you are undecided, pull the trigger and get this club.  You will not be disappointed.  Thanks again Titleist for another great club.