When it comes to responsiveness for home or business security monitoring, Alarmco is the best in the country! ADT is not even in the same league. One call, one person, and within seconds, you are getting the information or response you need. And their service sets the bar as well. Called them last night (Sunday) at 8:00pm for a proplem with a roll-up door that wouldn't set at my plant. They had a tech there by 9:30pm, who not only fixed the door in question, but insisted on checking the rest of the doors while he was there, fixed one more, and found several that needed minor attention. WOW! No other alarm company even comes close!