These guys were worth every penny. Know this, I'm a tough consumer. I called many places and learned a lot before I chose them. And, Mr. Duct charges more than most - but, there is a ABSOLUTE REASON FOR IT. Get this, I had a company come to my home (for about 200 less) 7 years ago and now I know why I paid less and why other companies charge a less. The old company just vacuumed/sucked up from the trunk line. The old company barely brushed/pushed from the vents with a manual brush. Mr. Duct did WAAAAAY MORE. They vacuumed from both the supply and return lines. But, they AIR pushed with a whip each and every vent! This is a major difference. (THINK AIR WITH A RUBBER WAND THAT IS TRULY BLOWING AND WHIPPING AROUND KNOCKING THE DUST DOWN TO THE VACUUM) plus the vacuum on the trunk end....you need to do both suck and push from each vent. And, they air line whipped down MANY feet - up to about 20 feet from what I could see. (Not just a few feet to "pretend" they are doing it.) And, they "really" did each vent. I saw them. They also put a sheet of paper on each vent so the suction would be "greater" on the vent they were working on. Makes common sense! No wonder why they cost more, they actually did their job. But wait, theres more. There were two guys - not just one. Big difference right there. They were both working 2-3 hours non stop to get this done. Right there was worth the extra money. I was happy to learn I was actually getting what I was paying for. They cut several small holes in my trunk line (don't worry, each one was plugged up and it does NOT affect the functionality of anything - you actually want them to do this as much as possible - it's a good thing and takes them time to do) they did this to really whip and clean each of the major arteries of the trunk. Makes sense. If you don't allow them to do this, you are only hurting yourself cause they won't reach as much dust. Also, these guys are "actual certified furnace" technicians. Major plus. (ya know, AC guys who are servicemen and trained.) Mario pulled the blower motor out of my furnace and cleaned all the dust out. (regular duct guys can't operate on your furnace - these guys did and that and it was good having someone look over my furnace and clean it up. It keeps your furnace going strong and that is like saving 100.00 on a yearly service call right there.) And, he dusted the heating elements in the furnace too. That alone took like 20 minutes to take the blower motor completely out and clean up. Again, I saw them do this.. I just had my wood floors done so they were pretty dusty. Mario and Jonathan were polite and kind the entire time. No wonder they cost more, they do their job the old fashioned way. They earn it. They checked (at no charge) for me the humidifier pad and we noticed it was brand new - (which wasn't good because it means it wasn't being used!!) I then realized I never turned the water drip back on my humidifier line last year when I put my new water heater in. Because of them, my humidifier is functional again. They didn't have to do that - but, they did as a favor. I like companies like this. I would strongly recommend this company. In sum, I think they like to keep their service guys busy when they aren't doing repair work - so, they have this business going. I'm sure they make some profit on the air duct work - but, they are smartly "earning" it. They are the real deal !! And, I want you to know I don't work for this company - I just like being good to those who are good to me. IT's nice not to get ripped off and get your monies worth. Rocky from Lisle read more