The installation was quick and not intrusive. The installer was well-informed, and walked us through the mechanical usage of the chair. He made certain that each household member knew how to use the chair. He told us what to do in case of electrical outages. So far, the installation and usage are life-changing. So far, I am extremely pleased. From purchase to installation to use, the Willliams stairlift, I am pleased with the professional way each step of the process was handled.