I was excited when the UC high-horn grips became available, but I don't really like it now that I got one. I always use a grip adapter w/magna or a boot grip to fill in the sinus, but these grips mash my finger into the trigger guard. They are also very heavy at 3.9oz. I currently own 19 sets of K/L grips and over 20 sets of J grips, and these are the heavier than my heaviest K target grips. Twice as heavy as any of my other J grips.
I also like most closed-back grips (like my Altemont Bateleur grips) because they "round out" the square frame area where your big thumb knuckle sits. But these are rather square in that area.
I'd say these are good for "average sized" hands but not L/XL hands like mine. The pics below shows it mounted next to my Bateleur grips. Note the smaller finger area and "sharp" square top.
YMMV.