Lamar....I was thinking like you not all that long ago. I still haven't had a chance to lay baits using this product along side ones without it in a serious, practical, situation in open water. Open water is where something of this nature makes it or breaks it for me. Most fish are sensitive to uv light, meaning they can see that part of the spectrum very well while we, with our eyes, cannot. The comment about this product turning black almost a deep bluish suggests that it is doing exactly as it is supposed to do. The bluishness is uv light visible to us at our end of the spectrum. Personally I now am beginning to feel there is merit to the claims and to using it, but I also feel that if this stuff lights up like the claims some issues might arise from having too much surface area covered with it. The same senario can come about that shows up when using glow pigments that cause an aura around a bait that fish can see as way to large and will ignore. I'm sure that a happy medium can be found if that is the case, but it will take some trial and error fishing to figure it out.
Since I got my uv I have had the chance to use it three times on small plastics fishing sunfish under the ice. I have open water around that I can either pop the boat in or fish the shore, but finding time is a factor along with favorable weather. This would be walleye fishing primarily however crappies are generally available with the boat if one knows where to snoop for them. Crappies are super sensitive to uv and if the stuff gets crappies in 34 degree water to hit better than a bait not having the uv added to it then my world just got better.