I am considering home security; what is your experience with Brinks, ADT, and Protect America/GE ?

I have scanned the internet about each of these three brands, comparing components, pricing, and service contracts; each of these providers list their offerings, and Protect America comes up as the best. I have searched for reviews from Consumer Reports, but I have come up dry. The various sites refer to the generic words, "consumer reviews", as well as "Consumer Digest". What is your insight on any of these three servces ? Can anyone find me reviews from Consumer Reports, as well?