This manga could have been better. Aside from the pretty good art, it's bugged down by the story and characters.

I find it quite hard to keep track of the characters. Maybe it's because of the pace of how fast characters are introduced and killed off, or perhaps it's got something to do with the similar looking characters. It's like a new character is introduced every few pages who you'll think is cool and important, but get killed off after a few pages (but not before showing a melodramatic flashback). This is like Gantz, albeit in much much faster pace.