We had Nick, the owner, come out today to clean our 18 year old white carpet which had black stains along all of the edges from being sealed improperly and collecting pollutants over the years. We moved in a year ago and immediately had the carpets cleaned by Chem Dry who told us it was impossible to remove the black stains... We have three cats, an active 3 year old, and a dog so we have compiled a fair amount of stains on the carpet over the past year.Dutch Masters charged a reasonable rate and successfully removed all of the pet stains collected over the past year and COMPLETELY removed ALL of the black stains along the edges of the carpet! I am thoroughly impressed with the caliber of work and its great having new looking carpet!