** spoiler alert **
Carrying on with the tradition from the last book, another character was killed off, and this time it wasn't some guy we didn't care about. Why Sirius? Why not Snape or the absolutely loathe-worthy Umbridge (whom I spent the whole book hating over. Twisted little piece of twist). If it's some plot-device to make us worry about characters the next time something awful happens...then it's not working. Every book in the series so far had a nicely-wrapped-with-a-bow, all-is-fine-eventually ending (except maybe the fourth book, which ended on a more somber note). I don't really worry about the main characters (Harry, Ron, and Hermoine) because I know they will pull out of it in one piece in the end.
Still, I enjoyed reading this one like the others-- especially noticing Harry's transition into a teen with emotional problems and issues(it makes him easier to relate to).