If you do, do you (and your SO) always arm it? And do you think it's worth the money? A guy with ADT just came by. They're offering what he called a special, but it didn't sound all that special. I don't have a home phone line so there is an extra charge for wireless. Would end up costing $41 a month. $199 for the wireless equipment. Other equipment and install is free, covers my three exterior doors and a motion sensor.