We moved into our home a year or so ago that had an existing hard-wired security system. We called a couple of other bigger name alarm companies to see if they could use my existing system and complement it with new hardware/technology. Most of them either declined immediately or just wanted to install another duplicate/wireless security system in my home because they didn't want to take the time to trouble shoot the existing one. The same day we called Safe Security, Steve came out and inspected our existing system. He took the time to explain our options and most importantly, was able to use our existing system AND convert it to a new Honeywell system with cellular connection!
We highly recommend Safe Security.