Check out a recent article in The New Yorker about the Millenium Trilogy.
http://www.newyorker.com/arts/critics/atlarge/2011/01/10/110110crat_atlarge_acocella
It's ostensibly about why the trilogy is popular, but I don't think the article is quite so specific; there's a bunch of interesting discussion of Larsson's background, the editing and production of the novels (in Swedish and translated) and the movies. When the author does "review" the novels, he claims the novels (or, at least, Dragon Tattoo), which were revised through editing and translation, "should have been revised more." He calls them "staggeringly boring," violative of "logic and consistency" and "banal." And, "the dialogue could not be worse."
For some reason, each of these complaints is exactly why I liked the novels. Am I just tired of the sublime?