"AWFUL. I used ADT for the longest time and it just wasn't doing it for me. Every time I called for customer support, I never got the help I needed.
I started using ADT because someone came to my door and I feel essentially pressured me into a getting a system. After letting him into my house and he estimated what system I would need, all of a sudden I saw myself signing a contract without talking to my husband first. I'm infuriated and wanted to cancel my contract, but ended up not being able to get in contact with someone from their customer service dept. I strongly DO NOT recommend ADT to ANYONE. Stay away from the scam!"