Half Blood Price was terrific and it stayed very true to the Harry Potter book series, but I thought it lacked more detail about the person that is the "Half Blood Prince". The ending also swayed away from the relationship between Harry and Snape. Those of us who read the book had a better understanding of Snape's character and his self conflict, than what the movie protrayed. Still it was a fantastic movie and I would recommend it to anyone who loves the Harry Potter series-book or movies.