Not a huge fan. Make sure you know when your contract is up -- I didn't realize I had signed a 2 year deal and when I wanted to cancel, I was stuck.
Also, depending on what kind of system you have, you may run into Shabbos issues. We had to have a special switch installed to turn off all censors (even when system is "off" the censors still flash when you walk by), and that cost a few extra hundred.