If you like regular shooter games like Call of Duty or Battlefield, this doesn't even come close in any department and will disappoint you beyond words.
It's a game on rails, so there is no freedom of movement. The graphics, sound, AI and story are all terrible but - suprisingly - it is, at least, playable to some extent.
If you like rail-based shooters like Time Crisis, again you will be disappointed - it just isn't as good as Time Crisis in any area.
A bad game that doesn't do the PS3 justice.