I hired Dominion to insulate the space under my flat roof. Brian the salesman came and quoted me a price based on the estimated roof area. However, the area sounded too large and when I remeasured the area myself, I found it was 25% less than he had estimated. I called him back and he remeasured and found that I was correct and he adjusted the price accordingly. But if I hadn't remeasured I would have overpaid by $200 -- not a great first impression.
The guys came as planned to install the insulation and were efficient and the house is now much warmer. However, my roof required that many holes be drilled in the ceiling to make access points for the blown insulation. These holes created *a lot* of dust and required filling afterwards with drywall compound. The filling job was poor, because they did not have time to let the drywall set in the holes. As a result, it bulged out of each hole, looked very unsightly and created a job for me to fix. Also, they did vacuum but the dust got *everywhere* and I spent hours cleaning up afterwards. I felt I was not adequately briefed beforehand about how messy the job would be.
So I had a very mixed experience with Dominion. The installation was fast, the insulation works well and the price was good. But the mistake with the quote and mess left behind were real negatives.