I just recieved my VZ 320 ultra slim blasted black canvas and their slim line screw/bushing. I went with the less aggressive 320 over the gator grips because I don't wear an under shirt. It is smooth enough to not irritate my back but still has enough texture for a positive grip than say a polished grip from carbon creation. The slim grips actually feel a lot better than the reg width grip since I have relatively small hands. Also since it is a canvas material, it does absorb some sweat.
Compared to a XD-9 Service (note that the 1911 grip is rounded off vs the squared off XD grip, making it feel even slimmer)