I have been using GripShift shifters for about 15 years and love 'em. Currently I have X9 G/S and an X9 rear derailluer. Shimano LX on the front. My rear X9's as well as the other higher end Sram shifters are a 1:1 pull ratio so they have to be run as a set, ie once you start with it you cant mix and match brands. The front doesnt matter. The rear shift is crisp and precise. I have small hands and find the G/S easier to use. It requires only the slightest twist to change the rear gears. My only beef is the allen bolt that holds the jockey pulleys in place is a teensy little 2mm and it strips easily making removal of these pulleys for maintenance difficult. I have a Sram cog too but I think I will go with Shimano when it gets replaced.