I wouldn't go anywhere else
I moved into a house that had been a model home for years, and every time my house was cleaned the spots on the carpet would come back. I saw an ad in the newspaper from Shamrock Cleaning and Restoration saying that they would be able to clean carpet spots permanently, and they did.
They're very accommodating: When I was in the hospital, they waived the minimum in order to do minor cleaning so I could come home to a clean house.