I had Comcast come out to demo their service in my home last week.  They sent a very knowledgable sales person to show me essentially the same demo they had at the Cable Show.  The pricing is decent ($199 setup, $39.99/month, lots of a la carte add ons for additional sensors, etc).

The biggest catch is the 3-year commitment.  The sales person said this is pretty standard in the security industry.  

But do I want to commit more dollars to a company that has perpetually raised rates on my service every year for TV and Internet?  I think there is a ceiling for operators if they don't resolve this trust issue with consumers.  If they lock me in on their security service, I'm locked in to their other services, and the odds they won't raise those rates yet again are not good.

I did some market studies with consumers on this topic last year and found a similar sentiment when it came to online back service through an ISP.  There's a concern that they'll lock people in, then they can't get out.