I found these folks by working along side them in a Habitat program, where they were installing an Energy Star level Heating and Air system. When I checked them out for work as a subconractor for my business, I found them to be very competitive in price and conscientious in the field. Their technicians were well trained, polite and thorough. I have used them multiple times now and after 25 years of contracting, these guys are far better than anyone I have worked with. Honest is the Word I'd use. Don't forget, there's always the possibility that a customer writes a bad review because the customer was the problem, not the contractor. Read more reviews to get the bigger picture. Be sure to be clear when you are pricing the work with anyone. The type of ductwork, the air filtration possibilities and the Energy efficiency of systems has a wide range.