This was a very nice movie. It is sort of a Facebook 2.0 with elements from the movie Live Free or Die Hard (2007). To be honest i shudder at the thought that a single network on the internet would ever get so much power. But then again, this is a movie and there anything can happen.
What i thought was really cool was that family values were mixed with technology and awesome computer battles. I did not understand that card game though, it seems to be a purely Japanese card game.
All in all i thought it was very good. As those last seconds of the countdown ticked away and that satellite was crashing down to that big mansion i knew that it wasn't go hit the mansion and kill anybody (it not that kind of movie, you can see that right from the start) but still, i was still cheering for Kenji to finish the hacking the system in time to change the course of the satellite aimed at them. What an awesome scene was that!
Why this movie isn't more popular i don't know. Everything you could possibly wish for a in a family feel-good movie is in here. I can definitely recommend this movie to anyone, even people who don't know or like anime.