I have used them in the past, and I thought they went on quite well. Don't remember if I thought they were too think or not, and on the truck I built I did not use any setting solution. Can't even remember if I clear coated them or not. Ok, so I'm not being much help! I do remember that I thought that the white decals we a little opaque.
APA Transport decals are Model Truckin', lettering is Micro-Scale, and the decals on the side of the hood are AMT.