I found it remarkable how engrossing a film it was, given that mostly it's just people narrating things to one another. So I have to give it a lot of credit for visuals that really drew me in. (I think my favorite moments were the dominoes, and the echo of the dominoes at the very end when all the masks are coming off.)
I read the graphic novel back in high school, and I have to say that I must not have paid very much attention, because, boy, it was all new to me!
The political commentary was all points that I think are pretty obvious, but it was still quite enjoyable. So if you haven't seen it yet, because you're as lame as I am, I'd say it's definitely worth a netflix or a rental.