I have to admit, I WAS SKEPTICAL about this grip. But, I took the chance and ordered one from Grant. It arrived Monday and I haven't shot with it yet. I can say the grip is probably the most comfortable grip I've used. It's not to skinny; or, fat. I was looking for another grip and was about to order another TD. Then I remembered how finicky the TD is fitting to some rails (I actually had to "hammer" one onto a Surefire rail). The QD has adjustment to fit variations of rail measurement. Another concern I had was that I often have other items mounted forward of the grip on the same rail. Sometimes I feel like a grip...sometimes I don't! The QD attaches and removes without sliding it forward off the rail...my other items stay in place. Fit is ROCK SOLID; and, may rival the CQD bolt-on.
One last thing...when Grant described the grip to have a rubber sleeve over it...let me tell you the thing is OVERMOLDED like Hogue products. The rubber composition is not tacky and does not rely on texturing or ridges to maintain a solid grip. Grants promise to return it if you don't like it kinda makes trying one a no-brainer.