ADT is the worst company I have ever had the misfortune of being duped into using. They have very slick sales and marketing, but from the moment you sign up it is not downhill, but straight off a cliff and then repeatedly knocked about the head. It has been two years of incompetence at every level, with the initial install being messed up not once, not twice, not three, but four times, and then the system failed several times requiring visits from their ‘engineers’ (I put that term in brackets as they never seemed to know why they were at the job, or how to do what they were meant to do, and were on several occasions extremely unprofessional and aggressive) then I was repeatedly charged for install works that didn’t happen, as well as being charged for engineer callouts related to the system not working, and pursued aggressively for not paying these phantom bills which, incredibly, included an entire charge for the whole extra setup of another alarm system, that I do not have and definitely never ordered, as well as exterior visual alarms that were mever installed. The pursuit of these phantom bills went on for over a year and a half, and required several hours on the phone spread over several weeks to be resolved. Oh and they never, after so many visits, removed the previous alarm system, a service they promised me, which I paid for, which i was repeatedly told would happen every time an angineer would visit, but which each time the various visitors would tell me “no, iv not been told to do that” before proceeding to mess up my system further then leave (on most occasions). No one seems to know what is going on at the company, as none of the departments seem to be in any way synced, so every single person you speak to at any point, one needs to start from scratch, which means billing messups and any issue beyond the most extremely basic ones on their end can seem irresolvable. Staff are rude and nonchalant, and seem to be well aware of what a dysfunctional company they work for. I have had faults on my system the entire time we have had it, but I gave up trying to get them fixed because of the stress and time involved in getting any engineers around and fear of further phantom bills and the consequent months of stress, emails, phonecalls and their aggressive letters. At least the alarm turned on, so i left it at that! Anyway, the alarm now doesn’t work properly again, and after three days of trying to get an ADT engineer here, having been told two days ago they would arrive ‘in the next four hours’, which they never did, then told yesterday repeatedly they would arrive, which they never did, then the engineer arriving today six hours after their timeslot, and not fixing the alarm, I’m out. My only worry now is that I’ve heard ADT aggressively pursues ex customers for bills issued after they stopped being customers with as much zeal as they pursued me for their randomly generated phantom bills. A note that it seems they have paid to pack online review sites with fake positive reviews. You can always tell by seeing the large number of 1 star reviews that tend to be well explained and realistic, then the countless, slightly weird and banal five star reviews.