[BogeyBoy]

You might want to discuss this in more detail with the company trying to sell you the film. When we lived in Naples we had film installed and they had a method of installation which improved the film/glass/frame connection. They showed us a pretty impressive video with the broken glass remaining attached to the frame after impact. Of course it cost a lot more than the standard film. I believe it is the same film (or a variation of the same film) used in government buildings in case of bomb blasts.

Our main concern at that time was a hurricane hitting when we were not there. As luck would have it were always there when hurricanes hit and we went through our ritual of putting up our steel storm shutters - so the film never got a test.