I have had the R-11's and G-20's(lower level)
R-11 are medium trajectory ball flight and no matter what ball you use they won't hold the green with long iron on a tight green...
G-20's are high trajectory and will hold most greens but not all...good set, accurate, my 6 iron was way off and unpredictable but nice set, better than the r11 irons by far...
Just took my G20's out of play tonight when I bought the bladez.