i have alot of windows and i mean a lot, all of the down stairs windows will be covered with shock sensors, once i decide which ones to use and research them some more..
It is possible to cut the glass out of a window without triggering a shock sensor if the sensor's sensitivity is set to a low level so as not to trigger on hail or heavy rain hitting the window.
Have you thought of adding break beam sensing to your collection of sensors. One set up properly that is a near perfect means to detect entry.