Overrated.
Don't get me wrong. The story is really interesting. However, the gameplay is so repetitive as to be honestly unfun. There is no interaction in the story or with other characters, and the only source of difficulty is scarcity of ammo.
Furthermore, some sections of the game were so graphically complex that my Xbox ground to a handful of frames a second. The game was virtually unplayable during these times.
Finally, there is no sense of satisfaction or catharsis at the end of this game. If anything, there is a sense of relief that it is finally over.