I haven't used Blue Star, but check out the most recent podcast from www.upnorthjournal.com (the Colorado muley trip). The host seems to be an every day, ordinary guy and had good luck with Blue Star on a recent CO hunt.
I looked at it, but felt it might be a little bit pricey.
I was tracking a tough blood trail one night, and broke out the emergency supply of Blue Start to try. You drop a couple special tablets into water in the squirt bottle. Then you shut out your lights and spray the stuff on the ground. And sure enough there was a thin trail of luminescent spots that we were able to follow. It seemed amazing! But the trail never got better or worse. Just a tiny trail of luminescent spots that you could easily follow.
But after a while tracking this way, I got a bad feeling that this might be too good to be true. So I took the spray and sent it in a few different directions from the same spot... AND EVERY DIRECTION had the same kind of luminescent trail. Even straight up the side of a tree! This stuff reacts with biologicals in such a way that it lights up tiny specs "everywhere" in the forest. So wherever you spray it you get a trail in the dark. Works so good its useless. Found every bit of microscopic spider crap and bug juice in the forest, but never found the deer.
Might be great indoors. Who kows. But in the woods there are a million things it detects other than just blood.
But you have to swirl it not shake it and when you spray you have to turn off all the lights