Kimetsu no Yaiba is so good it kinda reviews itself, if that makes sense. In all honesty, if there's an annual award for 'best anime', if Kimetsu no Yaiba: Demon Slayer doesn't get said award, I'll be shocked! Honestly, I can easily compare it to the likes of other Masterpieces such as Full Metal Alchemist: Brotherhood. It's serious that damn good.
Story: 10 - Wanting to turn your sister back into a human after she was demonised isn't exactly original, but the journey the MC takes to achieve this is simply outstanding. It's incredible how much emotion is poured into each scene, and I personally found myself either filled with laughter, adrenaline, or tears constantly watching this show.
Art: 10 - Easily some of the best artwork and animation I've ever witnessed in anime, Demon Slayer is top-tier for sure. The attention to detail in backgrounds and fight scenes is simply magnificent.
Sound: 10 - The opening and ending themes are awesome and I find myself never skipping either. It's easy to get emotional just listening to them when you think about everything that is happening in the series. The OST is some of the best music I've listened to in anime as well.
Characters: 10 - Characters are always what get my attention the most when it comes to anime. Kimetsu no Yaiba: Demon Slayer has an awesome cast of characters all with their own unique personalities and quirks that make them constantly enjoyable to watch.
Enjoyment: 10 - Every episode has an impact on the story or characters, and thank god there's 26 of them. If this was a 12 episode anime it just wouldn't be enough. Not a lot of the anime these days has been able to affect me emotionally like Kimetsu no Yaiba: Demon Slayer has.
Overall: 10 - It's one of the best anime series I've ever watched, period. I don't know what else to say. It's a masterpiece through and through.