For those that love the original and have yet to give this a look, I do advise perhaps taking a pass on this one. It has very little continuity with the original, and it doesn't expand on the overall story. One word to sum it up is this is clearly DIFFERENT (than the original).
Eureka 7: AO has a lot of mystery throughout. The biggest problem is the overall delivery of the story. The flow of the story is very choppy, almost like it was butchered in post production. Some scenes simply don't transition properly from one moment to the next. It is flawed in it's emotional delivery, and lacks heavily in character development. It's difficult to feel any emotional attachment to most of the characters as the story goes on. It does have great artwork and good music, but this isn't enough at most times. This is one series that could easily be redone with an hour and a half long movie that would probably work better overall.
I do warn that my next comments are a bit of spoilers.
SPOILER: this story works well with the time travel/alternate universe theme, and I do not feel it lacks in it's explanations of the universe. There are a lot of new things like their G-Monsters (or secrets) that have the cool factor.
