DIY security versus the CNET Smart Home
http://www.cnet.com/news/diy-security-versus-the-cnet-smart-home/

It's geared toward a DIY security system, if that is what you are considering.

I personally use Vivint for my security system at home, but it is a paid security service and it works for me. I have a doorbell camera, additional interior and exterior cameras, keyless entry, fire alarm, thermostat controls, motion sensor, battery backup, in addition to cellular backup. I can monitor cameras from my phone and do all sorts of stuff through the Vivint phone app.

I hope this helps!
-Lee