Despite it's 2 1/2 to 3 hour length, Oliver Hirschbiegel's film never slows for one second. This is a testament to his brilliant direction.
What is also brilliant is the acting of Bruno Ganz as Adolph Hitler. I have never seen such emotion brought to a role.
What really impresses is the stark realism of the film. You actually feel as if you are there when the Nazi world is crumbling.
Another great aspect of the film is seeing the humanism of the people. Some were thoroughly consumed with the Nazi madness, some were in a trance with their love of Hitler, and some, like Albert Speer, actually defied his orders. All were aghast at his madness at the end.