Overall, I'm very happy with how clean the system is. I got to look at their camera while they were cleaning them and saw the debris get sucked into their vacuum. Their setup was good, they put in good effort to reduce the noise of their equipment, they put a curtain in my doorway to reduce loss of heat and protected my floors and wall corners. The workers were very polite and professional. They pointed out an issue with my furnace which was fixed by a HVAC company shortly after, and gave me recommendations to make my system a little more efficient. For these reasons, I give the service 4 stars.
I am, however, disappointed in the cost of the service. I was quoted a certain price a week before the job but that quickly changed when they got to my house. It cost me 60$ just to cut 3 holes in my supply/return ducts.. something that I could have done myself had I known to begin with. They also charge extra to drive their whip down the supply/return plenum.. yet only took minutes to complete. One of my return ducts was not cleaned. I showed them where it was located, and to remove the cap since I blocked it off due to excessive dust. I didn't notice it wasn't done until after the fact.
I accepted these charges because I absolutely needed my system cleaned after 6 months of renovations and we're days away from having a baby.
For these reasons regarding costs, I may recommend this company but will advise those interested to make sure their quote is as accurate as possible to avoid surprises.