It's not bad, IMO not quite as good as IM2, but it sets up the baddie for the Avengers movie. Natalie Portman and Anthony Hopkins are always great.
I love the build-up towards The Avengers. It's a brilliant move that makes me want to see all of the movies, but none of the movies feel like they have sacrificed anything - the Avengers part of the story is a tiny addition, that could just has well have been added as an afterthought. But the effect is that each of the characters in The Avengers will have a strong build-up, something which they could never have managed in a 90 minute feature film. X-Men Origins greatly suffers from this - the friendship there is over mere seconds after it has begun to even start. That really undermines the depth of the old friendship that later scenes in the X-Men movies imply, partly thanks to the great acting. It's a shame because I thought the main characters were well chosen and could definitely have pulled it off. They should have spread it over three movies as well.
Of all of the Avengers movies, I like Iron Man best. I just watched Thor, and it was better than I expected, particularly plot-wise. Natalie Portman rarely wins me over however, and while the guy playing Thor did a pretty good job (and certainly looked the part), Thor is never a very charming character (which I think is correct, based on what little I remember from the comics), but Iron Man definitely is. The Hulk had some good acting, but the material is much harder to make a decent movie out of. I much prefer movies where the bad guys are interesting and have some depth.
Showing where the plot can make a movie suck to the core, I thought Season of the Witch was a huge disappointment. A great missed opportunity there to have the black plague be a punishment by god for the horrors of the crusades and witch-hunts, or something even more exciting. But no. The only part I liked was the montage of stupid battle after stupid battle, the actress who played 'The Witch' and the CGI at the end.
A more positive surprise was Limitless. While not as trippy as I hoped it would have been, it was still very well made, nice to watch, entertaining, and manages to take you in and feel like you're experiencing what the main character is experiencing. Well, at least it was like that for me and my wife, your mileage may vary.
All these watched on BluRay by the way.
Not expecting much from Captain America, but definitely have to see it now.