ADT specializes in locking you into a plan and forgetting about you. Ever hearse of the term "lock in." it's what keeps companies like ADT in business. They're banking on the fact that when you spend so much to have one of these alarm systems installed, it's very difficult and expensive for you to switch to another provider, which means you'll generally remain a customer, no matter how bad the service is. And as others have noted, it is awful. They recently sent a freelance contractor out to replace the wireless system panel in the basement from 3G to a more up-to-date cell communication method. He botched it and a few days later, all the alarms started going off at once. I called ADT and they said they saw nothing wrong on their end and that they could send someone out in a few weeks to take a look. They could literally hear the alarms blaring in the background (the decibel level was horrific, and I had to go around and rip the wires from the units to silence them). Then I kept getting calls from an ADT system over and over saying that there appeared to be something wrong and to call them. A few weeks later a technician came and acknowledged that the guy had screwed up the installation. They redid it. Then recently I had a problem with one of the smoke detectors and a technician came and said I should order replacement batteries from ADT because I was on the free battery replacement plan. This had been the case for years (25 to be exact). But when I called ADT they said the plan did not cover batteries (which cost $18 apiece -- not exactly cheap). Previously, I had spoken to a customer service agent to set up the appointment, and they too said I was covered under the battery plan. So now two representatives from ADT have said I'm covered and one said I was not. How bad is ADT's computer system that you get such different answers? Also, when I do replace batteries myself, the alarm goes off but I don't hear anything from ADT. They used to call to make sure there wasn't a problem. Now, nothing. This company is horrible.

Worst company ever Worst company ever! Bought the most expensive system 11 months ago. Nothing but problems. Multiple service calls and techs coming out (that I get charged for!). We finally turned the system off and it STILL alarms in the middle of the night. Had a house sitter here while on vacation and the system drove her crazy. ADT refuses to give me my money back and pick up their system. Going to refer this to my attorney.

Can't spend hours on phone Had 2 window sensors triggering tamper alerts, or just going off inappropriately over several months. Police called once. Talked to support, set up virtual tech appt (won't send to house anymore, I guess). Virtual tech quickly agreed the sensors seemed faulty, ordered replacements and set up future appt to install and register in system. Helped me remove faulty sensors from system (unregistered them). Box arrives with just one sensor. Tried online chat, who couldn't help, gave me phone number to call, transferred 4 times, finally someone seemed to understand and ordered missing sensor. Box arrives with install kit, no sensor!! Another round of calls, got cut off once, second agent did not understand me at all, tried to help me troubleshoot, despite my telling him I've already had virtual tech appointment, etc. I had to hang up on him, he never got it at all. Now I have a future virtual tech appointment to install and register my one new wireless window sensor in my system, I'm hoping the virtual tech can order the missing sensor, then I'll have to have another virtual appointment to get it registered as well. I've already spent 60 min on the phone just trying to get the missing sensor. Not eager to try again. When I purchased system 19 years ago, promised in house service (which would have solved this in about 30 min weeks ago), but despite increasing fees, I guess that's no longer the policy. It sucks.

Worst experience ever Worst experience ever! The sales man was excellent, then the technician came the following day and we had to literally throw him out of the house . Rudest person we've dealt with. He trashed the salesman, kept insisting he go upstairs to assess things. We told him we didn't need anyrhing done there,we only wanted what was agreed on. He wouldn't listen to us at all. How they can keep sending this guy out is beyond me. Two friends described him and said they both had the same experience. Wise up ADT

Their equipment and service is garbage Their equipment is garbage, customer service not much better. You can’t understand what 1/2 of them are staying and whenever there is an equipment issue, they just pass you off to another associate who also can’t help and so you get passed to someone else and on and on! It’s a joke!