Imagine a John Woo Hong Kong gansta movie, with Chow Yung Fat diving into a room in slow motion with his twin berettas firing, and you will understand this game perfectly.  You ARE Chow Yung Fat in this game.  Anytime in the game, a press of a button will throw the action into bullet time, a la The Matrix, where bullets glide by you in super slow motion, and you can react to enemies faster than humanly possible.  Not only does this look darn cool, but finally you can enter a room full of 10 bad guys with your guns blazing, instead of taking glazing shots from the corners and playing hide and seek.  Shoot-em ups are finally FUN!