I, too, have a Henry Holsters appendix holster or my Shield. I like it a lot and it conceals well. I did have to put some padding on it simply because it rides right where a scar from a surgery I had is. Any AIWB holster would probably bother me in that position and the padding helps. But the design of his holster is very good. The concealment kick that he puts in it helps draw the gun toward the body and conceal better. It also has adjustable retention. Andrew makes great stuff.
Depends on a few things. I have to admit I have never tried the AA, or the Raven ACR even, but I have tired a handful and actually helped AMHENRY test out his Appendix holsters before he released them. I really like them and I also really like the Raven VG2. Right now I am carrying in an appendix rig that AMHENRY built for me that allows me to carry a Glock 22 with surefire x300 and a spare mag at appendix position. I would like to try the Gcode/HSP INCOG, but I am so happy with the one I have now that I can't justify the money just to try something.