Mac is one of the best deals going. He turns out a great product, very fast turn around time and if there's a problem, it gets fixed with no BS.
The coating is nice. I actually like the tooth that the coating places on the metal. The texture isn't all that noticable, but it really helps when you are in a hot IPSC or IDPA stage, your hands are sweating and you need to rack the slide.
I have a bunch of guns, both long and hand done by Mac and will advise anyone looking for a moly finish to use him. I am finishing up a commander for my Mrs. that will be given her as a present. I actually decided against Rogard in favor of the Guncoat.