This system I don;t think has foiled any would be home
invaders (as far as I know) but it did alert me to the cat
picking the door open and trying to escape into the night.
The noise the alarm emits is very shrill and loud and would
scare any burgular (or cat) half to death.
I did have a problem with ADT in terms of being overbilled
at one time, but they pointed out they had gone to a
quarterly billing system of which I was unaware. I think it
is worth it to get ADT Home security system as it will
reduce your homeowners insurance bill. by about 20 percent
and give you peace of mind.
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