Mizuno are competing with my likes against Titleist. I've hit a few of AP2 and M59, yesterday. Both of them felt very good and the tape marks were consistently on the same spot for both. I thought it was already good, but the pros suggest an actual fitting in doors-- optimizing lie angles and club length and other things. I'm going back for another tester with them. Also, another store in the Palm Springs area that I go to does their fitting outdoors at the range.
The funny thing about this thread is, I'm not really in the market for a new iron set. I knew I was unhappy with my current set and had been going back and forth with my older sets. I just knew that there is is something else out there that is correct for me (my game). . . . maybe this is helping me find it.
Anyway, back to my question to you: What do you like in your iron design?