Damn, I feel like one of the few people who really really loves Kyoukai no Kanata on this damn site. I guess it's explaining time because as I really really like it I want it to have a halfway decent review. (especially since most of these seem written from a bias perspective from someone who only watched the first 3 episodes.
Kyuokai is not perfect, but it makes up for a lot of its flaws with gorgeous animation good laughs and a completely enjoyable ride the whole way through. The story of KnK definitely isn't original in the slightest to start off. Like everyone is saying supernatural girl meets immortal boy and they fall in love, and while people may whine that unoriginality just leads to a total shit fest I think that if something works and is enjoyable that's what matters the most, and while originality is always a plus (like in SnK's case) it is not necessary for a good anime.
Where KnK shines is in it's art and it truly is breathtaking. There are so many scenes that evoke emotions beautifully and really just make it an artistic masterpiece in it's own right. It's one of those anime that could be absolutely terrible and the art alone could save it. Luckily the rest is not terrible it's all at least acceptable.
The character's and character development are also high points in this anime. The characters all interact very realistically even if they are reused tropes. The animations of the characters face in a particular scene helps portray the emotions in that respective character in a very real well that leaves it so that there is no need for talking and there is a lot of silence in this anime that leaves the watcher to just look at the beautiful scenery which is where KnK shines the most and it definitely knows it does. The characters also develop so well having episodes where characters slowly become closer to each other instead of leaving it to be implied and that's a very good thing. (Funny enough a lot of people see these episodes as "filler" episodes, I do not agree, but maybe I'm just more optimistic and think Kyoani is smarter than that)
Another very enjoyable aspect of KnK is the level of mysticism it portrays and even if it is an overused overarching story it does a very good job at not feeling stale in the slightest. I believe it does this best through the soundtrack which is absolutely stunning and great to listen to.
Many people are shit talking the story in KnK and I believe that while it is partially justified it also partially isn't because KnK isn't linear. There isn't one story and it seems to fly by very fluidly instead of feeling like there is X arc then X arc it just feels like it passes very nicely. The pacing feels nice and it's overall just very enjoyable to get through.
In the end KnK is enjoyable, the art is great and the characters and story feel to flow very well. There are flaws and those are not to be ignored; however, it is DEFINITELY not nearly as bad as people like to think it is. You will laugh, you will cry, and you will feel satisfied at the end of it.