I loved the movie but of course the book is going to be better, for reasons TriforceFan stated and more. I mean, I'm getting to the point where "THE MOVIE DIDN'T DO LIKE THE BOOK DID" isn't even a complaint.
I think the movie as excellent, but I did notice small details that were missing (for example, the origin of the mockingjay pin). I don't think those are enought to consider the movie a bust, though.