Saw it this afternoon and it's a good film but not as good as the original IMHO. The definitive version for me is the three hour Swedish version.
But it was a good film which more or less kept true to the book with a few annoying tweaks. Opening sequence was excellent. Although Rooney Mara is very good in it, she is not a patch on Noomi Rapace IMHO.
I don't know if I would have a different opinion if I saw the Hollywood version first, but I prefer the darker, eerie, moodier original.
A couple of folk I was with preferred this new version, but hadn't seen the extended version of the original (only the cinematic version).