I liked it. The ending was disappointing, and I suspect that the ending I actually wanted was the original ending, but they went with this one to be more happy-ending friendly. It's not really a happy ending, but it's happier than the one that I wanted.
The CGI creatures were sucky. Something about modeling the human face they just can't seem to get right, but even with that in mind, they looked like CGI. Lighting maybe, or reflectance/radiosity issues. The CGI animals were obvious as well (also in one of the trailers-- it's like crappy CGI has become the norm.
On the other hand, Manhattan was awesome.
There were a couple of really awesomely moving moments, one of them just scary/suspenseful.
I'd say 8/10.