As a fan of the franchise, this was a wonderful treat for me. My expectations were very high ever since the Endless Eight fiasco in Season 2 but the film did much more than just fulfill those expectations.
What I really loved about this film was that it took its time, it did not rush into the situation but lovingly and subtly guide us through it. Never overblown, patient and mild, hauntingly realistic in some cases and plenty of time to express proper emotions rather than make the characters throw in goofy faces and tones.
Though predictable, the story was interesting and rather amusing. The movie was based less on Kyon's Journey, but rather him finding his true thoughts and beliefs at the end of it. These sorts of movies are quite rare, many exaggerate the adventure and its moral message does not reach the audience in the right atmosphere. So bravo to this movie.
Unfortunately, this movie will prove alien to anyone who is not familiar to the franchise, so any casual movie goer will find this film very difficult to follow and hollow in information and detail. Be warned. The movie does not stand alone.
The movie is a masterpiece to someone if they are a fan of the franchise, a puzzle to casual watchers, a surprise to Haruhi haters and probably the best piece of anime of 2010. I am looking forward to Season 3 now more than ever.