I've been impressed so far. I painted a 700ML muzzle loader with duracoat last fall and it seems to be holding up very well. I was extremely pleased to see the paint stuck around the breach plug (action area) even after 25 shots.
However I didn't have any luck with it sticking to scope covers.
My advise is to not put it on to thick and make sure it isn't dry spraying. Oh and some of the colors don't look like what is published (Desert Mirage Lizard).