SPOILERS
I'm finally done with the book myself. I didn't like it that much, but I'm a completist who would have probably loved 600 pages of explanations / tying of loose ends, so that's neither here nor there.
The first part of the book is way too disconnected and confusing, in my opinion. The school-year format suited Rowling's writing style much better: having the main characters jump around, seemingly at random, meeting other characters in a puzzling slideshow did not make for an exciting read.
The second half is much better, as it revisits a more familiar ground and does away with some cumbersome dynamics (such as the emo parts hyena was lamenting earlier). It's all still a little fabricated for my tastes (obligatory encounter with Draco-Crabbe-Goyle, obligatory cameos by all of Hogwarts' teachers...) but at least it's fun-packed and entertaining.
Most of the "shocking revelations" were figured out by fans at some point after book six, be it by cunning or luck, and I can't say something actually came out of left field to blow the reader away. The only things one couldn't fathom were probably the Hallows themselves and the many reasons behind Dumbledore's suicidal plan, but last-book additions are rarely very meaningful.
I'm satisfied with the body count: having Harry or one of his two sidekicks die would have been almost pathetic, as an attempt to surprise or move the readers. Instead, I couldn't care less about Tonks and Lupin, whom I always imagined as the goth chick in NCIS and a panting Saint Bernard, respectively. Snape had to die for dramatic reasons (as all tragic, seemingly-evil characters do), Fred's death was a pleasant way to streamline the Weasley family, and Dobby... well, as much as I love someone who shakes a finger at a powerful Death Eater saying "You must not hurt Harry Potter!", it's a difficult trick to pull off twice.
My favorite books in the series are GoF and OotP, followed by CoS, HBP, this one, and finally the snooze-fest PoA and the simplistic PS.
@hyena: I was trying to stay away from the Net until I was done with the book, so sorry if I didn't reply to mails you sent me. Not that I thought you would spoiler the book for me in one, of course, but I was concentrating on reading. Will get back to you later.