Horrible. I repeat horrible customer service. If you ever have a problem, do not call customer service unless you have at least 2 to 3 hours to spend on hold and being passed back and forth between their departments. ADT is by far the worse company I have ever had to deal with. Their Pulse services sucks and works maybe 30% of the time. If you need a reliable security system, you may want to shop around and find a better company.