We had combat gauze introduced to us on this most recent deployment. I would find myself reaching for kerlex out of familiarity before i did the thick, not easily op-enable, combat gauze package.
Another medic I know did use it one time and said he couldn't tell a big difference with it, but an over zealous brother had already placed a tourniquet on his leg and continued to return fire. I guess you can't really expect a Bravo to tell the difference between a mangled flesh wound and arterial bleed while he has someone to shoot at. They just get too excited to play with their toys.