I was moving into a new house with carpet and decided to have it cleaned prior to moving. Some of the carpet was dirty looking and some looked clean. The technician who was excellent did a survey and showed me multiple and I mean multiple pet stains on all of the carpet. Some of the carpet had been previously cleaned and the stains were not visible with the naked eye but were extensive with UV light. The rest of the carpet showed stains more readily. I decided to extensively treat the more stained carpet and that was very expensive and do standard treatment on the remainder. The results were truly excellent. There carpet looks great but the cost was $850 which seemed high for 3 rooms and a hallway. This is probably the best cleaning process you can get and all in all is probably worth the money