With four dogs, I have had years of pee-stained and heavy pee odor on my carpet covering my steps and landing. Have had it cleaned numerous times by other carpet cleaning companies, but the smell never dissipated. Kudos to Chem Dry for referring me to A-1 Carpet Masters. What I needed was a company who educated me that the floor boards underneath needed to be cleaned with the possibility of even having to replace it. Cleaning the carpet would not ever get the odor out! David, the owner came out and assured me that once he got a look underneath, he would be able to access it. He was wonderful. Using a black light, areas of pee could be seen, most on the landing. The landing would need new carpet and padding, and the sub floor sealed with Kilz. As I had no extra carpet, he searched for a piece of carpet that closely matched the color that I have. A couple weeks later, he completed the job telling me that he could not guarantee 100 percent that the smell would disappear (he only deodorized the steps) but the urine smell is gone! And the carpet looks new again. His pricing is very reasonable, and his care and concern to do a good job is unmatched. You will not be disappointed.