I invested in this bundle after discovering my eldery cat had peed all over my dog's bed one night. The pee soaked through to the carpet underneath and left a huge dark brown stain that I tried to remove with a professional carpet shampoo. The stain returned almost as soon as I had finished washing the carpet and I honestly thought I was going to have to replace the carpet instead. After using the stain removing treatment as directed? I could already see the stain lightening. One wash with the Pet Lab carpet shampoo and you wouldn't know the stain was there! The only downside? I now need to wash the rest of the carpet because that one spot is SO clean now and shows how dirty the rest of my carpet is! Absolutely blown away by these products!! I'll be investing in more for sure!!