I purchased the x16 irons shortly after starting to play. they brought me from a 25 handicap down to a 10 handicap, now that i have more advanced game I find the x16 is coming up short. The clubs just do not have the distance for the better courses and uable to shape my shots. This is a great club for the beginner, easy to hit, but not long, if your game is in the crapper buy a set, but if your game is advanced like mine i would recommend the pro series. hit em straight!!!