I have previous experience only with kydex holsters. After reading opinions of many who prefer leather, I decided to try a leather holster.
I got a High Noon Slide Guard OWB. The quality seems fine and the G21 fits the holster well.
I was wearing it around the house for the first time and my wife said "You're squeaking!" I admitted I was trying out the new holster and explained that one reason I was trying it was that it fit more snugly against my side than the OWB kydex I have been using. She said that the visual concealment factor might be improved, but not the auditory concealment factor.
So I have a question for you experienced leather chauvinists: am I going to permanently sound like a saddled horse wearing the holster, or will it eventually quiet down?