We hired Safe Systems for a shop owned by a friend of mine, for which I was the manager. Opening the shop each morning, we would often screw up our entry codes, and they would always call promptly to ensure that the shop was safe. They were all very understanding, and didn't seem the slightest bit annoyed with us, even though we kept giving them false alarms. Their communication is excellent, their prices are fair, and we have stuck with them for two years.