Buyer and User Beware We returned from a vacation to find our house had been broken into. But we had an alarm from ADT, so we "thought" we were protected. We soon found out no alarm had been sent because the burglars had cut the phone and cable lines. Lines cut no alarm. As we found out we had to have a backup system. When the phone lines are cut there is no signal sent telling the alarm company this. So the only high tech tool burglar needs is a scissors to cut the lines . So much for the digital barrier shown on the commercials ... read full review »