For people who only watched typical shonen anime, this is something that needs an acquire taste. The big reason for it is it does not run like typical series in which there is a protagonist out there to solve a problem and go stronger. Instead this is a psychological analysis of a theme beyond the anime world. The timeline doesn't appear linear either since you basically in the mind of a girl who is stumbling around the events around her.
In short, the anime explains how technology is more knitted into everyday society. Although some of the things it has are consider mediocre, they were consider very highly innovated and other aspects are on par with anime of today.
I probably didn't really explain much about it, but it is basically worth watching. Just be open minded. :)
