This product worked better than anything we have ever before! Was a little skeptical, but using it proved me wrong. We got a 2 month old pup last September and, as expected, had many oopsies on the living room rug while potty training. We have a carpet cleaner, but spots and stains needed to be treated first. I decided I would spot treat each accident (with other products) until he was fully house trained. He is finally done training. I saw this product on Facebook and decided to try it. VERY impressed! Most stains gone with one treatment, some required additional treatments but some stains were pretty old. I bought 2-32oz bottles and am buying a gallon refill today. Will be a lifelong customer. Thank you!!