I must say there was quite a bit of anticipation with this and to a point, it delivers quite well; the tone is a little darker thean 'OotP' but still retains a good amount of humour, with some genuine laugh-out-loud moments. Although it has a more emotional core, with the developing relationship between Potter/Ms.Weasley and Weasley/Granger, it didn't interfere too much with the story and just enough goes on outside of love triangles to carry the film along.
BUT, the pacing is very disjointed in places, some parts feeling like mere skits to the next scene, rather than part of one grand, fluid entity, the final 20-30 minutes in particular seeming a very rushed affair, almost as if to fall under some externally imposed two-and-a-quarter hour time limit. Also, some of the characters are horribly, almost criminally, under-used - most prominant in my mind being Helena Bonham Carter as the deliciously nasty Bellatrix Lestrange and Evanna Lynch as the beautifully ethereal Luna Lovegood (and if she was maybe 10 years older, I could really take a fancy to her!).
Then there's the omissions, some of which you'd expect with a novel adaptation - you just can't include everything, otherwise the movie would be about seven hours long, costing about a $billion to make - but the omission of the Hogwarts battle between the Aurors, students and Death Eaters is pretty near criminal. The only possible reasons I can think of for not including it are this:-
Warner Brothers wouldn't fork out for the pyros and stunt doubles, so therefore wasn't shot. Or-
The sequence was shot but was edited out, either because a) it would push the film outside its afforementioned time limit, b) they wanted to retain the sequence for an extended edition to milk the Potter cash cow after Deathly Hallows sees its dvd/Blu-Ray release or c) Warner knew that including that battle would show up the final film, seeing as the action quotient in it will be relatively low.
That's not to say the film is not a complete wash out; it's beautifully shot, the SFX don't even need mentioning and the young actors really are growing in their abilities, although I'm not sure about Michael Gambon playing the camp card with his Dumbledore, as opposed to Richard Harris' quirky eccentric. Saying that, special mention has to go to Tom Felton, whose portrayal of Draco Malfoy has gone from sneering spoiled brat to a young man made slave to the obligations of his lineage, which really does make you feel sorry for the guy and strangely, one of the few characters you do actually care about in the end.
Sadly, it's just not enough to redeem the film. Hopefully, David Yates can conjur up (sic) something a bit more well-rounded in the two-part climax.