I paid for the duct cleaning service through a Groupon promotion, so I think the service is normally more than $200. Either way, Dave's Duct Cleaning was great to deal with from the start, when I booked the appointment a month ahead of time, to when they showed up at my house at exactly the appointment time. I didn't have any furniture in the house, but they still took care to take off their shoes and put corner things down to protect the doorways and walls. They also provided me a face mask and headphones to block out the dust and noise, and all the before and after pictures and videos that they promise on their site. At the end, they had problems restarting my furnace (which I would not have known to check myself), so they called an HVAC person who ended up coming the next day to check if it was a Dave's Duct Cleaning error or just my furnace.
I thought it was great that they so promptly took care of their own mistake and even called someone in for me so that I didn't have to go looking for an HVAC person, and since it was their mistake I didn't have to pay anything for the furnace fix. I would definitely call them again in the future and recommend them to family and friends.