Had to try it. Purchased the size large, per Web site, for the CZ compact. Very comfortable and conceals well. It does bulge a little depending on where it is worn and what type of pants is worn. Thin material pants will print bad, I use cargo type pants somewhat loosely fitted, and it is not a problem. It sticks on the belt line slightly on the draw, but with practice it can be trained out. Easily carried all day doing numerous tasks involving sitting, standing, crouching, and walking with no discomfort nor very obvious printing. It works as advertised in this size IMO.
Things that I think would make this a winner.
Stringing the belt through the leather loops, especially a stiff gun belt, is a real PITA. If there where some kind of clip system that made it easier to put on and take off, I'd like this much much better.
Also, if the leather was sewn to better hold and position the pistol, preferably holding the gun's butt under the leather flaps, I think that would make the draw smoother. However, that would undoubtedly make the holster less universal and bring the price up as well.
All in all, I think it's a good holster for deep concealment. Just realize there will be certain limitations.