I don't read very much YA literature. As a fan of adult genre fiction, I find much of the category to poorly done. I've read the Hunger Games, a book which obviously shares much in common with Angelfall. And yet that book rated only middling well for me, but I loved Angelfall!
I'm a big fan of angel stories. I've always thought they were creepy, and I like the way it subverts common perception in our society. So the plotline of this seemed meant for me, as we have a destroyed Earth, laid to waste by hordes of angels.
The heroine, Penwyn, was neither irritatingly perfect nor bland. Raffe, the hero, was a bit blank to me in the first half of the book, but became more interesting as we learned a bit of his back story.
I have a few minor quibbles: I didn't really buy Penwyn's mother. She continously showed up ahead of Penwyn, and quite frankly it seemed a bit much, even in a book that contains angels and weird life sucking demon baby things. I was a bit vague on how the earth got to this point; other than the story of Gabriel's death, I don't understand the total breakdown of society.
Despite these few issues, it's still my favorite book this month. I read it, home from work with the flu, in one afternoon. Highly recommended, even to those who think they don't like YA.