Coming from Madhouse, it doesn't come as a surprise that the animation would be well handled in this work. This whole movie is an example of "willing the suspension of disbelief", especially as the story reaches the second half and is nearing the ending. The way it transitions from scene to scene, and also in how it maintains screen time between characters, add to the plot, give more elemental credence to the characters, and even push the story forward further. The animation is very critical in this movie, because it helps the viewer know how Mima is affected by the situation in the universe of perfect blue.
Combining both the animation and the plot, is the sound: the eerie, almost engrossing sound is unsettling, develops according to the scene. It is well executed so far as music is concerned. So far as dialogues are concerned, even the minor characters such as the critics within the film itself, are natural - as if they know the faults of the movie Mima is starring in, and realize how those faults were "engineered" to help her rise as a movie star. When you watch the movie for the first time, those snarky comments tend to be ignored, but then you realize, they do give a certain amount of depth to the way the story has been orchestrated.
This is a definitive classic, and one in which I, as a viewer, would recommend watching.
