HBP is the most-fresh Potter film yet at Rotten Tomatoes
RottenTomatoes.com is a movie review site that grabs ALL the movie reviews for every film and puts them into one percentage rating. This can give you an overall feel for how good a film is going to be.
Have you seen Half-Blood Prince's overall review? It's currently standing at a 98% with 41 reviews – and that is the highest percentage for a Potter film to date! Prisoner of Azkaban ranks second with an 89% rating.
Granted, all of the reviews aren't in yet so the percentage may slide down a bit. This is, however, a very exciting sign of what we all can expect from the film!