Instruct: Classify a review into positive or negative sentiment.
Query: Huge disappointment

As a huge Harry Potter fan, I cannot see how anyone could have enjoyed the Harry Potter and the Prisoner of Azkaban movie. This book is the best one in the entire series and I never thought it could be ruined. Before the release of the movie I thought to myself, how can it be bad since the book is so good? Well, the movie positvely butchered the book. The cast was fine, the acting was good, computer animation was great, but c'mon! Was the movie even based on the book because I couldn't tell! The movie was so unlike the book in countless ways! They added a lot of unnecessary things, yet left out some very important information. I don't know how they expect to make more movies because so much was left out of this one. People who only see the movies will be totally confused. So, if you are a big fan of the Harry Potter books, I do not recommend seeing this movie, much less buying it.