Felipe was extremely professional and knowledgeable about duct cleaning and sanitizing. The before pictures he showed me made my skin crawl. I had another company come out just a few years ago who obviously didn't do a thorough job (groupon deal). Felipe even extracted some toys from a vent that were from the family who lived there before us, 10 years ago. I guess that vent wasn't included in the groupon deal from the company before. I would definitely recommend ductworks, you really get what you pay for when it comes to this kind of service.