First off, I haven't seen the Anime so I don't know how disappointing or not disappointing they will find this adaptation, how faithful it was to the characters and story. But I enjoyed the hell out of it. I have always had a thing for multiple superhero kind of films. I was expecting more substantial role for Kamiki though because he is a fantastic actor, a scene stealer wherever he is and the reason I checked it out. However he was underused here. The special effects were decent. And its not bloodbath unlike other Miike films, just crazy insane, unpredictable fun.
I haven't watched the anime, so this review is based only on my experience from the movie. The later, got me confused way too many times. The whole universe that was presented wasn't clear and they didn't explain it properly enough for those of us who had no idea what was all these about. You did get a basic idea as the movie proceeds, but only because you are forced to link things together. Part from that, the idea was interesting, I guess, and the performances very good, as it is expected from Japan's hottest young actors today. The costumes were nice too and the special effects visually pleasing. So, 4 out of 10.