I had ADT for about a year and a half. I cancelled it because I moved. I, after much conversation, agreed to have it installed at my new address. The installation was to take place on August 29th. I began getting collection calls from the company, saying I owed $672.09 because I disconnected before the 36 month of my contract were up. This occurred despite the fact that I was going to have it at my new address and had been told that I wouldn't have to pay this because it would be considered a transfer of services. They also tried to charge me for services at my old address despite the fact that the system was no longer active. At no time was I able to get anything in writing. I, finally, just to put a stop to this nightmare and paid the $672.09 and cancelled the upcoming installation.