The INCOG is basically the only holster I use now. I have the original with a Mag Caddy and I am currently using the newer Eclipse that has the once clip on on it instead of the two. I like it better. I carry a Glock 26 or 19 in it. I have ordered a Shadow to carry my Glock 19 with a light on it. Don't know how often I'll actually carry it that way except when coyote hunting or other late night red neck games. But I figure options are nice.
Others that I have are the Bravo Concealment DOS, Raven Concealment Vanguard 2, Raven Concealment Phantom, and Crossbred supertuck.
Since moving to AWIB, the INCOG has been best for me. I carry all day everyday, and I used it a few months back in a 2 day pistol course at Valor Ridge. Retention is good. The holster doesn't move around a lot. Stays where you put it. My brother went with the 4 hole clips, I have the 3. I recommend the 3, the 4 may be a little better for concealment but it makes it just a little harder to draw. My first one only had the half guard on it, but my second one I did the full guard and that is what I would recommend especially if you sweat a lot. The half guard ended up giving me some rust on my rear sight. No big deal, but just pointing that out.