Reach 'Dead City' in the 2nd chapter and boy this game is so atmospheric. It looks stunning, even on the 360. Heck, it looks much better than Crysis 2 on the 360.
So far, I'm confused about the ammo swap, buying and selling. I haven't purchased a single stuff from those dealers, just gathering the ammo as I move along. Then there was this hooker who tried to pull a fast one on me, but I promptly reloaded my checkpoint. But I love how creepy this game is and it will really grab you into it. I wish there were more level like the Prologue chapter in the beginning.