When we signed up for Brinks home security we had free installation. When they came to install the system I was charged over $500.00 for replacement of window sensors they said they had to change, that were broken and or missing. When the tech connected us we had previously active working security system all ready in place and was in use and no sensors were broken or missing.we noticed the technician did no replace any sensors nor go to any windows or door ways to service them. He never moved from where he change over our dialer number to there company. When we got our first bill we immediately phoned Billing about the error. The customer service person became insulting. The they turned in several call that our alarm systems indicated a intruder for the police to be sent to our home. Each time we inquired about this oversight they would turn in a false alarm report. We paid the bill because we did not want derogatory information on our credit report. We have never got a refund of our monies. They purposely fraudulently over charged us as soon as our contract is over we will not renew our alarm monitoring service with them. Also we realised on several occasions our system was triggered and there was no response to our alarm insident. This furthermore shows is they aren't truly monitoring us. Beware of free installation, the are going to get your monies one was or the other. Mrs L. Dillon