I have one and Ive never heard of anyone having really any complaints about it other then dirt getting into the release button and then having to cut it off... and that was a rumor that couldn't be proven.
Some guys will say youll shoot your leg off but IMO... this holster leaves you in a better position to not shoot on accident them most holsters. You draw and your finger is almost forced off the tirgger.
Look at my 27 in the bottom of the pic. Thats the victim a Blackhawk. I must say though that the 27 was worn in the Blackhawk while riding ATV's in very dusty conditions a lot and spent quite a bit of time in the ATV tail bag while still in the Blackhawk. So that may have been a contributing factor.
Now days I don't worry about the finish of my Glocks so much. Adds character.
My daily carry for work is a Blackhawk CQC (plain clothes) and I put two tabs from the softer side of velcro inside, gives a little cushion.
I totally agree with MikeP, no matter what you do eventually you'll get holster wear from anything you get be it leather or kydex.
If you really don't want to worry about it go out and use the hell out if it, your bound to get a few scratches and nicks in it, then you won't really care as much. This tends to be my preferred method, as soon as I get something new I run it as hard as possible then I don't have to worry about babying it or worry about a scuff.........besides scars are character!