Yes, we went through it. The key take away was make your decisions based on what is happening, and what you know. Not a bunch of made up rules. Hide, flight or fight are all valid choices depending upon the situation. If you know the shooter is at the other end of the building..get the hell out. If he is outside your door you then flight might not be a good idea, it is time to fight or barricade.
In our office area we bought big hammers and put them by all the windows so we can get the windows open if we need to.