The overall movie was very good. I think that it portrayed all the major events of the first half of the book, plus it got into a very good detail of it. Only complaint I have with it, and this may as well be with the overall storyline of Harry Potter, is it's similarities to The Lord of the Rings. Example of this would be when they are wearing the locket (that still contained the horocrux) they tended to get angry/they didn't have total control over their thoughts. Which is the same as when the Ring of Power in the LOTR is worn, it slowly takes control of the bearers mind.
However the overall movie was great, definitely recommend for any fantasy/action moviegoer.