They never called beforehand. They said they were not familiar with that particular company policy. Once there, they were polite. I'm not sure if all vents were cleaned. I had to go back when they were finished and tell them to please put the furniture back. They put most of the furniture back but I had to put back the kitchen table And chairs. There still is directly under the overhead vent, because I did not clean it off, a mess of vent dust, pollen, and debris on the dining room table. I refuse to clean it off because I didn't put it there. They did.