I have one, IWB with clips, and yes, the extreme extreme can't, tends to sit the gun a bit lower, and it certainly hides the butt, better in my opinion.
I don't know about the leather slit kind such as the one in the picture, though. I don't have one of those. May work the same way, though.
I don't know about the leather slit kind such as the one in the picture, though. I don't have one of those. May work the same way, though.