Ok this is my short review, without any spoiler
----------------------------------------------------------
The good :
+ Very well choreographed fights !
+ Impressive action
+ Variety of weapons
+ Epic soundtrack
+ Fluid animation
------------------------------------------------------------
The bad :
+ badly written MC, weak, hesitant and whiny
+ a lot of plot holes
+ uninteresting cast, not fleshed out enough
+ too many unanswered questions behind everyone's motives
+ rush ending setting a 2nd season
I enjoyed it overall but I expected more answers regarding everyone's motive. I hope the 2nd season clears everything up. Also having a pop idol character was very cliché.
6/10
Bunch of random words because MAL wants me to write more words just to fill a quota for the review. Shame !!!