They've done work for many years for Cooper Rifles in Montana as well as for Wilson Combat. Even have their own line of 1911's I believe. As noted, beautiful, but not cheap.
I have known Doug for a few years and my Father has known him for as long as I can remember. Not only do they do amazing work, Doug is a really nice guy and knowledgeable in every aspect of the firearm. I have seen their work come back better than the original. As already stated, their case-colored work is second to none.
Have only ever seen two and handled both. One was a Ruger Bisley, the other a Winchester rifle. Both were amazing pieces. Someone posted a Ruger MK11; might have been Rocky that was super sweet. Many years ago Dad had a Colt .38 Lightning that had similar color case hardening. Great look on a firearm.