One of the best things in this anime is that it's deep as an ocean, but its waters are clear and you can see the benthic zone. It's not highly complicated, although it is full of amazing details and has a complex objective, most of the nuances are understandable and observable by the most realistic, "unimaginative" type of person. The use of arts, sounds, plot devices etc. are all explained, and everyone is able to understand that, instead of just people with an amazing attention to details. There's little implicit here, pretty much everything is explicit.
I could even say here what's the message it tells but I assure you that you WILL UNDERSTAND IT PERFECTLY as you finish it. This is for me the high point of the anime.
The characters aren't really complex (aside from Watashi himself) but that is not really necessary. They fit their role, whatever they are, pretty well. They're interesting and unique, and not eccentric for the sake of "look I can make some fancy characters".
The art is fantastic. If features either minimalistic animation with great character designs or small excerpts of real life and character interaction. Those moments are really subtle and add special flavour.
My review as I have observed wasn't particularly descriptive, so pardon for that. I think my point, the point I'm trying to make, is that this is a really intelligent anime. Nothing on it exists just because, and by the ending you will understand its lore and peculiarities entirely. So if you wanna feel smart by saying 'I understood all the metaphors', go for it.
