I is been play with R11 and is say same as the other peoples here, now no more has to change from driver speed to irons speed. I is a misses the ding hitter and they more easy for do this now slower than R11
I is sees to that the 8 iron more accurates to all distances, R11 not like that.
3 iron it is a little more long, not enough to makes big difference.
Got 4 iron full hit with all the backspins to stop besides pin on the Bethpage 7, that a first.
Low headwind having less notice than R11
9 iron I think less than full power be replaces mine pitch wedge it so accurates and good
Only first day and just practices rounds but they behave good for me.