I bought a home and ADT was already installed. I wanted to activate the existing system. Apparently this was impossible without an onsite visit. I scheduled a technician to come out. It turns out that he was a sales guy and wasn't going to do anything that day--but not before he showed up an hour and a half past the scheduled window, as though my purpose in life was to wait around for him and certainly not as though I have a job or anywhere to be or anything else to do. After wasting that time, he then claimed that I needed an upsell on equipment and used every high pressure tactic in the book. When I say I don't want the extra equipment, he adds it to the estimate later and insists it is necessary. And then says that he needs to schedule an actual technician to come in and look at the system--but not until I sign the 36 month contract. The technician did show up within the appointment window--about 5 minutes before it elapsed. He proceeded to take over 4 hours, including setting off the alarm multiple times, and billing for more parts that were not on the original estimate. Why did the sales person need to come out to do a quote and see everything if the tech was going to need to look at everything as well and have a completely different assessment and quote? That remains a mystery. The tech continues to set off the alarm several more times without warning. He doesn't seem to care that this is an inconvenience or that ear-piercing alarms might possibly impact anyone else in the house. When I ask how much longer the alarm will be going off, he shrugs. At this point I am over 8 hours sunk on service calls with a system that I have no confidence in. Great job, ADT. Great job. The moment the contract expires I will be switching to a different security system. It is appalling that the ADT attitude seems to be "We have your money so we have no obligation to provide service in a timely manner nor respect your time or home." I cannot recommend ADT to anyone unless you enjoy having your time wasted by multiple subcontractors who do not seem to know what they are doing. Clearly their business model is based on locking customers into contracts for a 3-year period and not on repeat business or a reputation for quality service.