I wanted to post my initial experience after two visits to the range with my new 716 AP1's that were custom fitted for me. I went with Mitsubishi KuroKage 65 G graphite shafts, which were SST pure. My iron set includes 6, 7, 8, 9, P, W, W2 and a Vokey 58 K-grind. Additionally, I'm using two 816H1's (21 and 25) in place of my 4 and 5 irons. My bag also includes a 917D2 Driver and two 917F2 Metals.
Unlike many of the folks here I just picked up this great game in March of this year at the age of 45. Wanting to improve as quickly as possible, this summer I started taking weekly lessons.
Getting back to my new clubs, I've discovered that the AP1's and especially the Vokey wedge force me to have a better swing to get the ball to fly straight. Don't get me wrong the payoff is a ball that jumps off the face of the club.
By no means am I saying I have completely adjusted to my new clubs but I see the great potential to improve my game using these new irons. As for the 917D2 and F2's, I saw an immediate improvement over my previous clubs. With a bit more practice with my new irons, I will walk on to the course with so much more confidence than before thanks, Titleist!