This is simply amazing. I've tried everything for my naughty cat : Nature's miracle, Urine gone, Planet Urine, Resolve, Oxyclean, Baking Soda, Vinegar. The only thing that "worked" was White Vinegar, but then it smelled like vinegar which is better than cat urine, but still not great. This guy did a lot of research and found the magic formula that neutralizes the odor. It doesn't cover it up with a fragrance. It just smells like "nothing!" Nothing is good! Nothing is great! After sniffing around for the source of cat urine, it's so nice to not smell anything where my cat decided to make his mark.
I was surprised that anyone left negative reviews because it's worked so well for me. I saw that a couple of the reviews said that their dog or cat peed in the same spot after using this spray. You should know that this product removes the stain but it doesn't prevent your animal from remarking the spot. There are products like feliway for cats (don't know about dogs) that supposedly keep animals from remarking. I've found what works best is a combination of double sided sticky tape over the spot or cat scram ultrasonic cat deterrent in the area to keep my cats away until they lose interest in returning to the spot. I also have removed and replaced the pad underneath (carpet cleaners do that all the time) because the urine seeps right through the carpets and if the pad smells, then they come back to it again. Carpet padding at Home Depot is pretty cheap. The final thing I've done is put paper towel between the carpet and the pad to "test" if my cats are still peeing. Two of the spots are clear, but one of them was remarked. I put another dose of this stuff on it and I haven't had a problem since.
**I don't really know about removing the stain because my carpets are kind of off white. I couldn't really "see" the stain, but my nose knew where it was!
But the most important thing to me was getting rid of the smell and this product did that like nothing else. After I sprayed with the product, I covered it with double sided tape to keep my cat from remarking it. So far, so good.