So after resolving to play this entire season with my G10 from last year, I found myself at my local pro shop killing time during my daughter's lesson. Today was the 4th lesson, and consequently, my 4th day at looking, holding, fondling the i15 in the shop. I finally broke down and took it out for a spin. Some background: I have been playing the G10 (9*) for a little more than a season now and have been very pleased with it. I have the pro launch red stiff shaft and generate a swing speed in the 110-115 range typically. I was not on a launch monitor, but spent about an hour on the range with my driver and the i15. During the course of the demo, I had three shaft changes, and finally settled on the Diamana Blue. All I can say is wow. My G10 gives me a great ball flight, distance, and forgiveness, but I have struggled to move the ball with consistency, but gladly gave that up for the forgiveness and the fairways hit. I would not say I have held complaints about my G10, but the two hang ups I have had (if any) would be workability and feedback. The i15 has fixed both of those, at least for me. The feedback on hits was much better then with my g10, but I could not tell if there was significant distance sacrificed. On center hits, I would say the distance was similar, maybe with the i15 edging it by a few yards. Without the benefit of the launch monitor or being on a course to see the difference, its hard to say conclusively. What I will conclude, is that for me, working the ball right and left was much easier. I know this is a fade biased club, and having always hit neutral, I halfway expected to fight a slice or have to over compensate somehow. I was absolutely wrong. I am going back to tomorrow to see if I still feel the same way. If I do, I may wind up with a new gamer this year. I also plan to get it on the launch monitor so hopefully distance can be confirmed one way or another. I will post the results when i have them.
FYI - i did not hit the G15. No particular reason.
Hope this was helpful.