While it is a good product, it is also the only wireless option you have if you have a GE/Simon compatible system. The newer and more attractive Interlogix ShatterPro II and ShatterPro III are both wired. So you either run wires or attach a Honeywell wireless transmitter ($50) to each sensor and then add the Honeywell receiver to your system. Even with that you still need to wire in power.
So this is a good sensor. We've had a false alarm when a balloon popped in the middle of the night about 6 feet away from it. But, that is a false alarm that I am ok with because it could have been something else.
Interlogix really needs to up their game with their new sensors however (ShatterPro II and III). In today's wireless society Interlogix is moving backwards in their R & D. So what if the wired version has 5 more feet of range and looks better?! If I can't easily install it, I won't use it!