I am a big fan of Japanese anime and I also like the X-men universe, so I thought I would like this a lot. But after watching X-men there is no good thing about it I can think of.
The animation is obsolete, something I would have expected from animes in the 80's maybe. I was so confused, in fact, that in order to complete this review I went back a few times to make really sure I saw the 2012 version and not some knock off.
The story makes no sense, with insane and cardboard bad guys, ridiculous female characters and really boring and bad dialogue. The difference between the powers and behaviour of female heroes compared to male ones was immense and totally uncalled for. All of the Japanisation of X-men had the problem that they made all characters behave like Japanese people, actually, but this was the worst. Imagine that Storm got tired after each attack and the other two: Armor and Emma Frost, could do only defensive things and maybe give a punch or a kick sometimes. Even Jean, the character that dies in the start of the series, can only do one thing: die to protect her friends. Useless in almost any battle, they are there to be protected and talk about feelings.
What I think bothered me most, though, is the lameness of it all. After anime of terrible beauty and horror and others brilliant ones about friendship and camaraderie, after twisted tales of amazing character complexity, the Japanese think they could reintroduce X-Men to their country using this crap: empty dialogue, cardboard characters, stupid plot, stunted violence.
Conclusion: You want something Japanese with super powers, just watch Akira! This series is a stain on the anime community.
