First off, Nick you're awesome for making this thread. XD
I preordered the Kindle version of the book. I was able to read about 30 pages or so before class this morning. I like what I read. Even at the very beginning her writing style from the potter books shows through. The vocabulary she issues is much more mature than the Potter series. The one thing that gets me though is that this book feels overtly British. The potter books didn't feel like that, but as I'm reading this book I'm constantly reminded she's a British author...just from words and phrases she uses in the characters dialogue.
I really havent had enough time with the book to fully comment on it, but I did want to put down my initial thoughts.