The best Harry Potter movie. This is the first time Dumbledore is written and acted correctly, which is ironic considering the film's ending, but the actual atmosphere of the books is recreated nearly perfectly for large sections of the running length, which is incredible considering that no other film in the series had ever captured it at all. Obviously, it's merely an incomplete glimpse at the awesomeness of J.K. Rowling's work, but for people who've read the books, it's brilliant to see everything on film along with absolutely incredible ILM visual effects.
My criticism lies with the the overexposure of the love story arcs. It's nowhere near as bad as some reviews make it seem, but I could have done with a little less of that, and a little more of actual Half-Blood Prince and Voldemort stuff.
In a sentence:
The closest the movies have come to the books' greatness, with some (finally) great acting, great decisions regarding the plot, and as usual, amazing SFX.