If you are expecting this to follow the manga just don't bother watching. If you were thinking about reading the manga or watching the anime but wanted a decent preview to what to expect. Watch it ! Overall it does pretty well for a movie that literally starts in the middle of the manga. If you know nothing about Gantz it does it's best to explain it all to you. The good thing about this movie is that it doesn't really spoil anything for you if you haven't read it yet since it changes quite a bit. My only warning is prepare yourself for a lotmore intense nudity and sexuality explicit content if you decide to read. Overall worth the watch .