I loved it. I was a little disappointed that the book's story was dumbed down for the movie. The book left V a very morally ambiguous character, one you could love and despise at the same time. It also raised the question, what is terrorism? Some of V's actions are questionable, but can they be justified, given that he's fighting against an oppressive government?
That said, the movie is still more intelligent than most of the Hollywood dreck out there.
Yeah it would have been nice if they'd left V as an anarchist who might not be (and probably isn't) any better than the government he's opposing. One of the things that makes the GN so interesting is that he's really not a good guy, he just happens to be fighting another bad guy. But taken on it's own and ignoring the GN, and ignoring the ham handed "Bush is evil" sections, it's a pretty good movie.