ANOTHER SPOILER - DONT READ IF YOU WANT TO SEE THE MOVIE!!!
Ok so I thought it was terrible. It was ok if you were there only for the action and a perve on Will Smith, but the story line was horrible.
Here are some more holes in the story line:

Why did normal humans who became sick with a virus suddenly acquire super human strength?

How did the lady get to the refuge in the end if all the bridges were blown up so no one could get off Manhattan Island?

When Will Smith was using his vaccine on the zombie, he locked it away in the glass room and here the lock was on the outside as he locked the zombie in. But then at the end, when Will and the others hid in the glass room, suddenly the lock was in the inside to stop the zombies from getting in.

When the dogs attacked his dog, why didnt the zombie man come out and attack Will as well?

Will Smith states that the zombies had lost all human attributes. However, the zombies were able to set up a complicated trap to capture Will, but if they were mindless zombies, how were they able to think up that?

Why could the zombies only yell? And how were their jaws able to open so wide?

How did the lions and other wild animals get onto Manhattan island?

How come Will Smith couldnt keep up with the deer things when he was driving a really fast Mustang?
I could go on but I cant be bothered. All in all it was scary and had plenty of action but the story line was just way too pathetic! Not worth the money!