For those who hated the ending...(SPOILERS)
What would have been your perfect ending?
Would you have just had Cusack kill Gary? Would there have been a twist ending? Would Cusack come down the stairs instead of Carpenter? Would everyone (Cusack, Carpenter, and Roberts (Gary)) have died?
I, personally, would have liked for Cusack and Carpenter to have had a mini-tussel before he throws, kicks or punches her out the window to her death. He still would have been shot, but it would have been more climatic. Whether or not he died, would be up to the viewer.
But, I did like the ending. I would have liked it if they would have taken a different approach.