Possibly the worst customer service I have ever encountered. They are totally unresponsive and do not care about their customer at all - zero interest. They are a big company resting on their reputation as a leading provider. I had 7 contracts with them, but have now cancelled six and look forward to changing the last one. Currently they are sending me invoices that I am trying to confirm and am six days in to the latest waiting period for any kind of response. My advice to anyone considering ADT is don't - find a local company that actually cares about you as a client, someone you can call and speak to and one that actually responds to email queries. ADT is just awful!