I have been using the G15s and really liked them, the meter speed takes a bit of getting used to but when you hit them sweet they send the ball like a laser guided missle.
Today however I have decided to bin them and go back to the G10s. The swing meter is so fast on the G15s that any stutter in the meter makes it nigh on impossible to let it run out. Your instinct kicks in and you click meaning you end up dubbing the ball 40 yards.
I wont be buying any further new clubs with a faster meter for this very reason.