My review. Is a rough translation of my original review
The movie is a 7. If you like the current episodes instead of "classics", you have the ringtone of Homer singing, or something like that, add two, is a 9.
Great movie. Though the evaluation is limited due to the fact that I could only see half the movie thanks to the stupid idea of no showing it in his original audio in any theater in my country. The humor as reflected in my rating is similar in tone to the current episodes in TV, but bigger, much bigger, and yes, there are sparks of the classic humor, plus some really nice shots at the government and church (but don't expect anything as rich in details as the classics). If you take me as a sample of someone who adores the old episodes and hate the current, I laughed a lot, the intro to the movie is wonderful, it made me laugh, and gave me the chills with the feeling of huge event, and I enjoyed a lot watching the movie being true to the current series, without pretensions of being the ultimate simpsons story, but entertaining and not avoiding the trademark bitterly evil humor, always willing to getting dirty.
The animation is exquisite, y pretty nice to see 2D animation, especially 'cause it mirrors the series, which is the reason the whole word is going to see it
Go see it, don't let it pass, y stay trough the credits! (all the way to the end!)