Got this deal from Groupon. I checked out the reviews here and gave them a shot. Previous owners of this home had cats, which I'm allergic to. The guys were in on time, explained to me what they were going to do, started the work promptly, made sure to clean up after themselves. They gave me advice on changing the filters and made recommendations. Air was much cleaner when they left. I bought another Groupon today for my mother's house.