ADT tech service and customer service is horrible. Malfunctioning fire alarm that was "free" with my initial installation was going off no-stop. Called ADT and the tech on the phone told me the batteries need to be replaced. Got a on ladder with him on the phone and informed him that there weren't batteries in this system. He said he would have to send a tech out to inspect the system. Waited months to get a tech visit that wasn't considered "emergency" visit with a $300 charge attached. 4 months later the tech comes, after 5 minute inspection told me the tech on the phone should have never told me to change the batteries, the system is wired & broken and that he will order a new one to be installed. A few days later he come to install the new fire alarm, 10 minute job, no mention of service charge or fee for installation. A few weeks later I get a bill for an installation fee for $672. I was HOT, after getting the run around from 4 different people in the billing department and they said that would issue me a credit but I would have to pay $150 for 30 minutes of the tech's time. I refused and told them to cancel the service. Why would I pay $672 or even $150 for a $20 alarm I could get at the hardware store. They said they were still going to send me a final bill of $747, tech visit and monthly fee. What a joke! Completely unethical way to charge customers to replace a defective system. Rip-Off - Please stay clear of ADT.