The animation is detailed, the direction solid and there's no filler. Add to that a sumptuous score and Kon's perfect sense of timing, and you have a beautiful film that will last you a lifetime.
A film that combines strong social commentary with a terrific sense of paranoia, leading you on with each successive twist but scoring purely on execution rather than surprise effect.
The good stuff
That said, Paprika is still an amazing film with plenty of memorable moments and a superb finale. If I sound a little negative that's only because his first two films are hard to surpass.