I've have had a CQB for about two years now and have put 2K to 3K rounds through it (it will feed anything except short SWC). There is a slight amount of finish wear on the rails, but other than that it looks the same as the day it came in from Wilson. There has been no holster wear (using a lined leather holster). The only marks on the gun are some on the inside of the mag funnel from doing reloads.
Mine is all Armor Tuff, adjustable night sights, 3.5 pound crisp trigger, full length guide rod, ambi safety. The price of admission is high, but a Wilson will elevate your shooting.