Just ordered my GTS 2 after multiple fittings and testing. Upgrading from a 910 D2! So far, it's given me about a 7 mph uptick in ball speed and 10-15 more yards of carry. The dispersion is great too. I was in the A1 setting in the 910 but I play the driver further back than I should and it is spinnier, about 3500, but "most" everything was in the fairway. Went to the A3 setting in the GTS 2, got my spin down to 2400-2500 average. Shaft also went from the Aldila RIP shaft 60 2.9 stiff to the Tensei 1K pro red. Little lighter and lower kick point to help me square up the face. I did like the new Titan shaft in a 60g stiff and got a little more distance, but the impact feel, sound and dispersion from the Tensei were just a little better, even as I got tired. I did a fitting, then went to another store and tested it out against the QI4D and got kicked out of one bay, moved to an indoor trackman bay and spent another hour in there. Clearly I am picky and need to make 100% sure it's the right move after 15 years. Can't wait to get it out on the course!