They checked with us at every stage, to be sure they were doing what we wanted. It was hard work and noisy and messy, but they did everything to our satisfaction, and in a timely fashion. They cleaned up after themselves. We have never before dealt with a company who gave such clear and detailed proposals, and who also followed up, to make sure that we were happy with the job. As a side note, when we bought this house we came across a 1988 proposal of work by the same company, to be done in the same house, and the proposal was just as clear and detailed then, and, obviously, the previous owner had also hired Mergen Company.