I loved the book. At first, I thought it was going too slow and JKR was feeding us too much information too quickly (her style seems to be to conceal the information until the end). I knew by the first chapters (the Snape making the Vow chapter, actually) that Draco would probably kill someone. I knew that because of the wording, Draco would doubt and Snape would kill the person. It didn't help that I figured Dumbledore would die in this book... I was surprised at the romances, but overall I loved the book. It was great.
But I still think my fav book is book 5