When I purchased my house the previous owner had 3 dogs, and it was quite evident from the fur, scratch and bite marks left throughout the house! I made an appointment with Sears to clean to see if they could clean out the air ducts and inspect before moving in. The guy who came to inspect was friendly and took me around the house showing me what was going to be done and gave me an appraisal of how clean/dirty my ducts were. He also gave me some good advice on how to maintain my furnace, etc. The cleaners came the following week and were just as nice but didn't seem quite as knowledgeable. They got everything done in a couple of hours and were very thorough. In one case too thorough. They ended up taking the new and high-end (basket-type) furnace filter and exchanging it for a low-end one. I don't think they realized that it was a new filter and just changed it out just to change it out. But overall, I would hire them again. I'd just watch them a bit more carefully.