I made the change and love it.

I was fitted for the TS when they came out and could not make the jump from the 917D2 because my fitter and I just could not justify three yards increase on the range. My fitter has been with Titleist over 25 years and does this full time. I have two fitters in this area I use and this time could not get with him and my other has over thirty years experience but does fittings indoors and is Titleist certified. This time we picked up ten yards over my 917D2. Time to move up in heads. Using the same shaft as before (Fujikura Tour Speeder Pro 64 S) we showed improvement and maintained the same accuracy. Our choice was the their choice for me was TSi3 based on Trackman results comparing the two drivers results. Let it be know that I can still move the 917D2 with accuracy from the senior tees, better than most my age.

I just can't do the shape of the TSi2. Great stick, but I've always been a '3' player and I went from TS3 to TSi3.
TSi3 is the best looking driver on the market and it's not even close.