I'm a die hard HP buff so it would be pretty difficult for me to give this movie less than five stars. They did, of course, leave a lot of from the book but to not it would have been a 6 hour movie. I did, however, want more at the end of the film and was disapointed that the fight scene at Hogwarts was removed. There was also some embellishments and minor story changes that happened, but they were overall acceptable.
The effects were great and more characterization was given to some of the major players- Dumbledore, Snape, Draco to name a few. For those non book readers, this film should give you an idea of where the series is going and how it will wrap up in the finish.