I like the no-nonsense keep-it-simple idea of the Hip Grip, and the fact that it's from a company local to me, but when I tried one I just couldn't get over feeling the gun wasn't secure enough with just the roughly 1-inch "lip", without any clamping function, holding it to my pants. Sitting down or moving around vigorously, I wasn't confident in gravity alone keeping the gun where it belongs. I looked at Collins' version and while a bit classier, from the photos it appears his "lip" is even shallower than Barami's, which would have me worrying even more.

That's not to say I think they're a bad idea- they just don't work for me.