We moved in to our neighbourhood near downtown London 18 months ago - within the first few months of moving in, we had an L shaped cut made in our dining room screen (luckily we have window stops), and our old basement window was jimmied to try and break in that way - we called a few alarm companies, but ADT was reasonably priced for our needs, and they came the next day and installed a basic alarm system - door monitoring, a window system on our basement windows, and a motion sensor for when we are out (works even with 3 pets). We liked the fact that we can upgrade or add to the system later, and that we could pay for the system plus the monitoring on a monthly fee. When the smoke alarm went off and my husband couldn't shut it off, the alarm personnel were very helpful over the phone. Excellent service all around. The system has been easy to use and reliable. We feel much safer, and haven't had any further break in attempts.