Like just about everyone else in America, I saw this movie in the theater last week. I've gotten mixed reviews from my friends, and I suppose my review is somewhat mixed too. Bottom line is I liked it. Pros were the story development (especially along the philosophical/theological lines) and the action/effects (of course). The main con in my mind is that many of the fight scenes were too long and the effects were not as consistently seemless as in the last movie. Many people disliked the "cave rave" scene but I actually enjoyed it although I have to admit it made no sense whatsoever. Just looked like a great party to me :)
The thing about the Matrix is that it's really about taking japanese anime inspiration and bringing it to life. There was no mistaking the anime feel this time. I can't find the reference now, but I have read earlier that when the Wachowski brothers pitched the movie to studios, they showed them graphic animations depicting a cyberpunkish superhero. The first movie was just setting the stage for the real story about this hero.