Installation went well. The installer arrived within 15 minutes of the estimated arrival time. He inspected the (3) entry points I needed to secure, and began installing contacts at these locations. Next, he installed the motion detector, removed the old keypad from a previous security system, and then installed and programed the new keypad. After giving me an overview on the keypad features, and illustrating how to disable, enable, or reprogram the function buttons, he installed a cellular unit in case of a power failure or the phones hard wires are cut.