I had to wait about 3 weeks to receive it and was very skeptical but it was worth the wait! Followed the directions and used it on old dog urine areas in carpet and it worked! I did a 2nd application and no more pee stink or discoloration. It was pee stinky as it was working but that smell disappeared. Also tried it on chair upholstery that my male puppy had been soaking (I didn’t know-never saw the sneaky guy do it). Apparently it was his “go to” area and I was sick about the discovery because it’s custom upholstery and very expensive. I just knew the chair was ruined but this product saved it and the fabric looks great! I did need 2 applications but the patience paid off and no stain, no stink! Also, tried it yesterday on a dark food vomit mess and it’s already done! Thankfully, a 2nd application wasn’t necessary for that issue. So far, no areas treated has show any signs of reemergence. We are breeders & I’ve tried it all. Have been buying enzyme by the gallon…now it will be My Pet Peed all the way!!!