As a customer of 23 years, they forced me to “upgrade” two years ago. It was not a good experience. First the install was poorly done and had to have a service person out to correct the problems TWICE! The original installer was a contractor who took 6 hours to do what should have been 2-3 hours – and he did it wrong. Second, the sales person lied to me several times about the system especially about having to replace the batteries. In years past, when I needed to call ADT, the service was fast and reliable. With this new system, when I have to call them I have had to be on hold a minimum of 25 min. and often transferred and cut off after being on hold. Last time I called it said my wait would be 111 minutes. Yes, you read that correctly 111 minutes on hold. Who has that kind of time? I am stuck with ADT for now. They won’t give me my money back or even acknowledge that their system was NOT an upgrade. The last time I actually got a supervisor on the phone after holding for 30 min. she promptly transferred me to another department where it said I would have to hold for 20 min. 23 years of not having to touch the system or worry about it but now I have a system that randomly has batteries go out and I have to pay for them. I WOULD NOT recommend ADT if you can avoid them.