Not all anime are for kids This anime is excellent. If that is all you are looking to know, then by all means go watch it right away. The reason i like it is because of the feeling of existential dread i feel because of it. It covers topics like destiny and god in a little bit different way then we are used to i.e. they dont openly slap you with the ideas they want to explore, it is a very subtle approach. The characters are interesting, unexplored, in the sense you do not know what they are thinking, everything is shown through action ( subtler approach again). I found this relatively realistic, and genuinely refreshing. This implicit explanation of the world and characters make you just keep watching with more and more
questions you want to be answered. The last episode is truly the culmination of the series and it will make you feel something ( for better or for worse). If you want something different and new, this anime is for you.