I am not a samurai fan , and therefore i can clearly say , it’s one of the most amazing work i have ever read :
-art style : it’s so simplistic and yet so impactful , it make the battle so clear i love it 9.5/10
-characters : there is no good , but only bad people and scum here , each one of their story is well written , so well , that sometimes you dont’ want to return on the main characters timeline ( and they are good) the chara design is absolutely god tier 10/10
-story : you won’t be bored , i feel like there is no exceedîng chapters , useless chapter or boring time on it 7.5/10
-thematical : quality ( badass swordsmans)over quantity (normal citizens) ? Blood over peace ? add to that a revenge led by a 16 years old girl who’s teacher is an immortal and immoral man . 9/10
Little bonus : the gore and the violence is well mastered +1
If you love awesome characters with awesome fight in a seinen way this is for you
9/10