I have a Comp-Tac MTAC and a Remora 10A-ART XL for my 29SF. My wife and I went hiking earlier this year and I took the 29 in the MTAC. We hiked for about 3hrs and the 29 wasn't really that noticeable. I like this holster, but it's much easier to use the Remora.
I recently acquired the Remora because I needed something that could holster the gun with Glock light/laser. I called Remora and they recommended I ask for the XL version, in order to make room for the rather bulky attachment. Anyway, this holster is great. Infinitely adjustable, stays right where you put it, easy to draw from, and cost about $30. Heck of a deal, considering what the MTAC cost.