It is truly remarkable how good the people at Pre-lock really are. Knowing how hard it was to install an alarm in our completly finsihed home, i truly had no idea it could be done after speaking with other security companies. There staff no only installed the alarm without any wires showing, they did it without any damage to our home at all. My wife is a a clean person who tolerates no dust, or mess. i am pleased to report she is very happy and loves the new security we installed. You guys are the best security company we have ever used .