The construction and quality of Mizuno products are unbeatable.
These clubs look and feel great. I have for the most part always played Mizuno's so I got what I was expecting.
LOSS OF DISTANCE! The long irons take a bit of getting used to. I love these clubs except for the fact that I went down half a club with them. Don't get me wrong I am not one of these golfers with a distance ego. If I need to take an extra club then great and if my playing partner is using one less iron than I am, then good for him! I had the MP-30's before the 57's and for example, with my 30's a solid 5 iron was 200 to 205. With the 57's a solid 5 iron is 190-195.
Bottom line is that these clubs feel great and you can work the ball fine with them, but be ready to lose a club or at least a half of club compared to your old irons.