RUINED! Katayama should be ashamed. SPOILERZ
I would LOVE to know if Yuji Iwahara even got to look at the screenplay for the film before it got sent out. Because this is complete *beep* in comparison to the manga.
I know, I know: all hardcore fans say the 'book' is never as good as the film. But here, they took on a task that they probably shouldn't have tried to fulfill in a movie (about 4, or even 3 OVAs would have done the trick): they cut out HUGE chunks of plot and character development in order to condense (I suppose) the film into the time allotted.
And the drastic changes made (such as Alice being a program, Vega being alive, Ron and Marco's death) were unnecessary and alarming. What the hell. I am pissed.