I recent got some of Silver Creek's UV stuff and it is certainly as advertised. I got it with the the high powered Lithium light and can say it is certainly worth the money. The stuff dries with absolutely no tackiness and in only a few seconds with the high powered light. I find it best to hold the light a bit away from the fly or it starts to smoke, as Henry said it would, but I have had no problems with discoloration. One thing about the stuff is it is fairly thin and is quickly susceptible to gravity. I find that it is best to apply a quick thin coat, cure it, then add to it if you want a thicker coat. It does droop fast if you put on a thicker coat (I mean before you can pick up the flash light) so a rotary vise comes in handy so you can even out the coat before zapping it. With the applicator brush, it is really easy to lay a thin base coat before building up a head or body, but it definitely droops faster than 5 minute epoxy, Loon UV, or water based stuff like Fabric Fusion.
Here are a few I did with Henry's stuff
And a surf candy. The body really built up nice and makes for a great translucent glass minnow