I bought it and I have used it. It is amazing. You can watch the stains go away. It is like magic. Old stains and new stains. Sad to say, my carpet is at least 16 years old. For the fist 13 years I had dogs, one in particular that peed on it and my disabled husband spilled juice (purple colored) on it daily. The last 3 years, I have had 3 dogs who don't seem to get it about peeing outside. (don't scold me, I know) so my carpet is perfect to try this on. I have used every possible combination of cleaners in the past. I have used enzyme cleaners, and mixed up batches of home remedies guaranteed to remove the smell and the stains. They didn't. I got this 2 days ago and used it on my more obvious stains and it was like magic. They disappeared before my eyes. I can't say enough about it.