I think both of the technicians did a great job at cleaning. I got a groupon for $105 up to 10 vents. And it turned out I have 16 vents so they charged $60 extra from the vents. They also charged $75 for cleaning the blower and $45 for sanitizes ( I couldn't tell the difference). I don't like to pay for the extra fees. I also had my dryer vent cleaned for $69.99. So I have paid a total of $379.41. Kind of expensive, but at least I am only doing this every 3 years (5 years if you don't have pets.)