The summary: I liked it.
It was even bloodier than I was expecting. I mean, that fits, what with a war going on. But it was still such a sharp increase from previous books that it was a bit surprising.
This was another book that I thought could benefit from a bit of editing. Parts of it dragged for me, less sections of the story and more some individual scenes. But the tone was well-played; I got that sense of desperation, paranoia, and fate.
I wish there had been a bit more of Snape, McGonagall, and Trelawney. They're the characters I find particularly interesting, so I always wish there was a bit more of them. ;) I was pleased at how Minerva, my favorite, acquitted herself under pressure. She went from scolding Harry for impudence to being field marshall under siege without ruffling her tartan. Bravo! :D
[Added:] I got all suspicious when they had Nigelus' portrait in the tent and they asked him to get Dumbledore. He said that they can't go to other people's portraits. Now I thought that he was bluffing them, since we've seen (e.g. Sir Caduggan, the Fat Lady) others move through paintings that weren't theirs. I thought that Nigelus was being all sly.
Kit pointed out I'd missed the qualifier "outside Hogwarts". They can freely move between paintings inside but not outside. Sounded fishy and arbitrary. But it wasn't a ruse... just Rowling covering a crack, not Nigelus playing them. Darn. :P