Hmmm, if all they do is break glass and climb in the DS10A doesn't protect anything. It only detects the window frame moving.
If there is something that the burglars want, they see the magnetic switchs, know it is an X10 system, and know the can pop the batteries out and take their time ... why not. Of course, you hope the motion sensors eventually pick them up. But I think they would pull the batteries to have a better chance of not getting caught.
My wife doesn't like wires. The shorter the better. We are trying to be creative on hiding the transmitter in/under things on the window sill.
And if you have enough power horns and you don't live in the country they just might not get away before before someone arrives!
...S