I have ADT and got them after I had a break in. I have had no problem with them at all. Now the deal they advertise is probably different than what you may want installed. What the website shows is just a couple of doors, the panel and maybe a few other things. When I had mine installed I got every window in the house with a sensor and all three doors. I have one panel and one motion detector in the house. I have them monitor it. It is wireless and I do have a contract for them to monitor it. The installer was very good and he gave me good advice on security and what to do with the install. I have never had a false alarm. I have done several tests and it has worked fine. I have accidentally set it of a few times but not caused any problems. I am quite pleased with it and its been almost two years.