Just got back from seeing it...fucking AWESOME!
Kenneth Branagh nailed it perfectly! Good action, good story, and everyone did their parts just right.
Like I've said before, we saw it in 2D, and that's the best way to see it. The visuals for Asgard are pretty awesome and probably don't turn out as cool during the 3D conversion.
And of course, like any Marvel film, stay during the credits, there IS a cool "holy snap!" moment as well as plenty of cameos & character mentions and other cool shit leading up to The Avengers.
But I'd still like for Branagh to come back & do a straight up Thor sequel.
Now I'm 100% confident Captain America will be just as good, maybe even a little better!