Three companies were suggested by my loved one's Physical Therapist. Amramp called me back immediately after my initial inquiry. As for the others, one never offered to come out, and the other contacted me two weeks later. Amramp promptly sent Tim, who was wonderful. He explained everything to me and understood my concern that I did not want the chair near my newly painted walls. He also carefully explained where and how the chair lift goes into the step and not the wall and how removal would not leave a visible mark of any significance on my carpeted stairs. I wanted the chair installed right away because my loved one was sleeping on a pull out bed downstairs and couldn't climb the stairs. Tim and Anthony came over within days to install the chair. They were both neat and skillful and the installation was done within two hours. Everyone was professional and easy to deal with. I cannot think why anyone would go to any other company. The chair is quiet and easy for anyone to operate. Highest recommendation.