Honestly, I was terrified after reading the bad reviews. But we read our contract carefully, negotiated the terms we wanted, and got an excellent system.
We had an out of state first alert system, and I love this system. Yeah the monitoring is a little expensive, but I got all sorts of equipment professionally installed, it costs me just a little more than doing it DIY (aka myself).
We got our old system taken over, new smoke detectors installed, glass break, and a couple nice LCD color panels. I can arm and disarm the system over my phone, and it works flawlessly.