I'll be brief;
1. All the budget goes into the animation, and anime fans will call anything a masterpiece as long as it has cool fights.
2. Absolute dogshit storytelling; story is not anything special, and the amount of times the MC gets a flashback that just happens to be containing the specific hint about what he needs in that given moment, is ridiculous. This mf has a flashback every 4th swing of his sword.
IF youre looking for a good simple anime, watch this.
If youre looking for something that will require more than 3 braincells and actually give you some brain thought or engage you in some way other than "wow what an epic fight," do NOT watch this