After reading two volumes, I wasn't sure that the series had enough life to justify my buying fifteen volumes. After four volumes, I'm still expecting some padding, but I'm leaning toward a wholesale investing in the series.

Anyway, the flashbacks give a lot of depth to the various characters, but I wish that each of the characters had a little more variety to them. They are all either completely wholesome, misunderstood geeks who either pull it together to survive, or who completely fall apart; or they're vicious scumbags who embrace the evil of the Program. The art is solid, but I'm not a huge fan (the constant close-ups of crying, nose-running lunatics/desperate kids is more annoying than moving). The depravity of what these kids do to one another, and their various schemes for survival, make it a pretty compelling series though.