the guys came and put in the insulation in the dark. With no lights on they missed 6 proper vents. This was discovered after I called the company and told them I wasn't comfortable that they would do a good job in the dark. The rep from the business came and it was discovered that the vents were missed. Without barely an apology, he said he would send the guys back. If I was elderly or did not go up stairs when they were working, I would have been cheated. Paying full price for a substandard job.