I have used the services from Dustin's Mechanical to help install an air conditioning unit and they also provided some duct work for me. I have been with them since this year, and they have managed to prove that they are worth the cost. I think the pricing is actually pretty competitive - they have nice, clean work and they have great equipment. I would definitely recommend them to other people, and I would keep using them in the future. I think they do excellent work and I hope that they keep it up.