I thought this UV stuff was a fad, thought it would run its course and be over and we'd move on when people realized it didn't make a difference... but it DOES make a difference, and it isn't a fad. Flat out, this UV stuff works. I tried fishing a dry tied with UV dubbing, with a nymph tied with near identical colors just not uv, behind, and they went for the dry. Switched and had the dry "normal" and nymph UV, and they went for the nymph. Did this on different locations, different times, even by myself and my son so different fly fishermen. As for colors, the amber and BWO mixed 50:50 works wonderfully as a generic [BWO/Sulphur/dark cahill/even PMD sometimes] imitation color. The color isn't so important, but the UV is. This stuff goes on really fine, you could touch dub with it but I admit I haven't tried it. I can get noodles so thin that I see the thread color shining through the dubbing, on account of the dubbing able to be spun thin (not on account of some crazy flashy thread or something). Newer user of this stuff, was turned onto it at a fly show in Somerset NJ in November, and had to buy a dubbing box since. Very pleased! Love this stuff!!