I voted IWB. I wear either a Glock 23 or a Springfield XD-40 service in a Comp Tac C-Tac and it is very comfortable. It is tuckable also. a couple of mods I made to make it about perfect for me, and those that like the idea of Kydex, but think its too uncomfortable: I put a layer of moleskin cut to the shape of the holster on the side of the holster facing my body. It grips my t-shirt really well, and makes the inside softer. I also rounded off the end of the holster (the barrel end) by grinding it a bit. I can wear this setup with an IWB extra mag holder all day and it stays EXACTLY in place and is amazingly comfortable. I have some leather holsters, but this is the best for fit, thinness, and comfort. And no 16 week wait, either!:h: