The trailers for this & animation style led to me to believe that it would be on the order of 7 and up age group, but that is dead wrong. What you get instead is is a space academy, growing up sort of story which perfectly captures teen angst (as far as I can recall those days!). It is perfectly believable, right down to some of the most cruel, cut-em-off-at-the-knees conversations between the 2 leads I have ever seen; the poor guy literally has no chance to speak & has no idea at all what he may have done. The science part is also believable; a lot of concepts get tossed around in a plausible manner, but especially in how people might react to the tech involved and how they would treat it. I found myself getting absorbed early and really pulling for the characters as the series began to reach its end.
Aside from wanting more episodes, my one complaint--very minor--is that I would have liked a little more demonstrative and definite ending. It's clear enough & logical, but I'd like to have *seen* it rather than be told it, as it were. I admit this way is more subtle, though. And I can't tell you more without spoilers!