We have ADT and are happy with them. We have all entry points covered so alarms will go off if any entry is tampered with. They have called quickly when we accidently set the alarm off. They also have an added feature if you come home to an intruder and realize it before disarming the system you enter a different code so the system stops making noise but ADT alerts the PD that an intruder is in the house with a family at home. We also have the fire detector in the kitchen which goes off automatically if the temperature in the kitchen goes up a certain number of degrees in a certain amount of time.