Was a little leery due to some negative reviews. My sister bought one when she got a puppy and recommended it. It works well, and what it reveals is disturbing but helpful.

I use Nature's Miracle in the red not white bottles (which I highly recommend) to clean up canine messes. I could tell which spots I missed, which ones I treated well (coz I couldn't find them and I know the pup peed there), and which spots I didn't spray a big enough area. There would be big clear spot in the middle and faint borders where I didn't spray enough on the edges.

Use it in the dark. It's like the lights in the indoor glow in the dark golf places. It'll highlight other things like miscellaneous fuzz or little particles on the carpet. So you may want to vacuum first or you may see psychedelic little particles everywhere. My finger and toe nails all glowed in the dark too.

I pointed the flashlight pretty much straight down and would sweep back forth for thoroughness. It also illuminated other weird spills which left a trail as though someone was walking while spilling something (hopefully not tinkling while walking around). Spots I missed (so didn't treat with Natures Miracle) really glowed brightly. Ones I should treat again were much fainter. I found disturbing spots where someone peed on the baseboard and the post for the stairs. (Maybe the previous owner's dog since they were rather low to the ground.)

Buy it. Hope you don't get too grossed out.

Perfect got it for spotting scorpions in SoCal.

Worth it just to say "I told you so!" to my boyfriend, who didn't believe his precious widdle princesses (cats) were peeing on stuff. Now we can find the messes easier and clean them up better. He's still in denial though. The wrist string broke almost immediately, but it didn't impact usage, so no big deal. Besides the cleaning aspect of it, it's also just fun to look at stuff with it, I never knew the world had so many....stains...

We have pets. I mean a lot of pets. lol We got some urine cleaner and it said to get a black light to see where your pet has done it's business. So, I bought this. Whoa! My pets really love me- they did their "business" everywhere possible. So lately I have been the house commando and going room to room with the blacklight flashlight and hitting it with the urine be gone similar to Pet Stain & Odor Miracle - Enzyme Cleaner for Dog and Cat Urine, Feces, Vomit, Drool and making it my duty to clean every square inch of our house. I was skeptical at first, I had no idea that a blacklight would show urine stains ( now I wish I had this when I stayed in motels).... (actually pretty sure I am glad I didn't) but have found all of the urine stains and have treated them. Recently our 17 year old cat passed away and we are getting 2 new kittens to take his place (I know- that is not really possible) but we are getting 2 new kittens and want to start with a clean slate. We have been going through the house methodically and treating everywhere our pets have "done their businesses: and hping to start with a clean slate. I t was quite an eye opener to see what we have been living with. If you have pets- you definitely need one of these. This way you can treat the areas where they have been "active" and change their habits. I am hoping we can start the kittens with a clean slate and keep them in their litter box where they belong. When you shine this light on anyplace that a pet has urinated on it will shine like a beacon.
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This light is awesome for those that collect the radioactive depression-era glass. Uranium glass fluoresces bright green under ultraviolet light, and you can tell the non-radioactive from the radioactive glass even in the daylight. Just take it in to the antique store and have a ball!