I know that I will definitely have to see this film again. Japanese movies are getting that sleek futuristic look and Returner is chock full of it. Although I have to admit, there seem to be a lot of "homages" ranging from Matrix, Men in Black to Fifth Element, X-Files and so on. Still, it's an action packed with cool style to boot.
The main hero and butt whooping babe work well together. From martial arts, lasers, guns, explosions, action scenes are so rapid that you're left blinking in awe. I definitely think towards the final 30 minutes, it does seem to go on a tangent and a friend and I were trying to piece together what we could and keep up. The CG is used well in enhancing the style of the film, especially the futuristic technology stuff.
If possible, catch this in the theater or on a good home system and you won't be disappointed.