first of all i think f/sn is a good anime. but maybe it is because i didn't play the visual novel yet. but first of all i like the concept of the story about the war and stuff, but what i didn't like was how they created the main character his personality. the idea about being a hero without making sacrifices really bugged me through the story. i don't know how to tell why.
qua art, it wasn't the best but not the baddest. I think the art suits the anime and it's a pretty "old" anime too.(our technology for animating and special effects is evolving so fast).
the soundtrack is nice but not very vairant. if you take attack on titan they have soundtrack for like every different scene but that's too much. But f/sn didn't have so much different OST's.
i really enjoyed the anime, but it starts pretty slow, the first 10 episodes were not so interesting in my opinion. but the action scenes are pretty awesome, the laugh moments are in it and of course some feels.
