I just installed the SimpliSafe home security system and I must say it's great! The installation was easy and straight forward. What I like most is the expandability. You can add sensors to it without much trouble at all. Other companies want to send out the "technician" and charge extra to reconfigure the system. It works off a cell signal so having a landline is not necessary (you can use a landline if you want). No contracts, no termination fees and the monitoring starts at $14.99. So far I'm very impressed and hope this will be the only security system I will ever need.