Professional from start to finish. I had the TAP blown-in insulation installed over my old "settled" insulation. The assessor was up in my attic and took into account the floor area I used for storage and existing insulation. He answered my questions (area to be covered, rafter vents, clean up). They were the lowest price (but in fairness, all 3 quotes I received were within 8% of each other). The installers arrived on time. Laid out tarps, covered attic entrance, blower was kept in the truck... basically when they were done you couldn't tell they had been there... no dust/debris in the house or in the yard. They would have received 5 stars if I hadn't noticed that they were getting ready to blow the insulation without installing the rafter vents. When I asked, they said they thought I didn't need them. When I mentioned it was on my quote, then they spent 25% of their visit installing them without hesitation. I would still use them again.