My primary rig is a Milt Sparks VM2 with a Kimber Pro Carry II. I've worn it near daily, for going on 3 years now.
It is a large holster, but I honestly rarely even notice I'm carrying. It has become very easily my favorite IWB holster. Enough so, that I ordered 2 additional holsters for a couple of other guns that I sometimes carry. It takes commitment to order from them too. I think my last one was nearly a 4 month wait. As of right now, their site is stating a 12-18 week backlog.
It does not shift around easily. Drawing and reholstering is easy and clean...and no 'kydex clicking' in the process. I have to go out of my way to get my gun to print and the comfort is fantastic! I can't go around doing handstands and expect the gun to stay put, but running isn't an issue at all. I can even break the rule of belt holsters and wear a subpar belt. Draw is still smooth as the holster stays right where it is supposed to stay due to all the surface friction against the body and pants. I was skeptical of their quality before acquiring one, but I am happy to admit I was wrong.
The only negative I really have to say about it, is also one of the reasons I went with it. My day job, is that of an executive. That means tucked dress shirts. The VM2 comes with some optional clips that are supposed to facilitate wearing the holster with the shirt tucked. I've tried to make them work, but have not been successful. Maybe I haven't watched the right YouTube video yet, or something. Regardless, that was a letdown for me. I've managed a work-around vie attire changes, but I really did have high hopes on those clips. In the end, it doesn't matter that much. At least half of the people I work with during the day, have taken one or more of my classes on the weekends. So it's not like I'm really fooling anybody at the office anyway. :smile:
They are pricey and take forever to arrive, but they are very easily my favorite IWB holsters in terms of quality of construction, easy of use, and comfort. Doesn't hurt that after 3 years of use, it still looks good...not that anybody ever gets to see it.