Being a Ghibli film alone should be as much of a testimony as any as to the excellence of this film. Nevertheless, i'd like to rave....
Contrary to the usual direction of Ghibli fims, in which troubled souls find themselves flung into the depths of magical mirror universes, 'Whisper of the Heart' unfolds completely in the real world. The difference being that everything magical takes place clearly within the imagination of the main character - a young high school girl, desperately trying to feel unique.
The scenes set in the imagination are animated to feel like augmented images of the real world so that, as a viewer, you find yourself feeling ductile between landscape and mindscape. When the feature finishes you don't feel completely returned.
The film also shows a real attention to the inane details, which in any live action film would just be trivial. But to see these things animated, it really shows the levels of devotion people have given to it. Not only these, but the larger things as well, like the expressions of the characters, or the musical score - they're all an index to its masterfulness.
I'm honestly in love with this film - yes, solid, unconditional love *cough*. It is just wonderful. If you give it the two hours of attention it deserves, enchantment will betide thee.