After watching this a second time, I will say. It is not nearly as deep as it thinks it is. It takes way too much time out of the story, and even themes it wants to explore overall, to say mostly nothing about important topics. While the visuals, music and voice acting are quite good (both in English and Japanese) the story is what really lets down, especially in the last 2 thirds, where the writers seem to get bored with their current "thesis" and start to explore others. What I mean by "thesis" is that, the series wants to explore the ideas of the "raison d'etre" the reason to live, the purpose of life, in the specific. Without exploring the idea to its fullest, it does take a large chunk of space to explore other ideas. I can not say the story is good or bad, it is just ham handedly used to help explore the ideas the writer feels like exploring. While not bad in of its own self, Philip K Dick, for example, heavily used that, The execution in this series is done badly, as nothing is fully explored. Everything is started and then dropped off. Also with the ending itself, seems to make the entire exploration with these characters pointless. I will not go into why here, just that it suffices to say that the ideas explored are just dropped for a ending that is clamped down, as if the author just came to a point and said "the story must end here now, and let there be no question as to whether there could be more after", much in the same way Technolyze did.
Long story short, It is Good looking anime with an appropriate sound track and decent voice acting. It tries to be deep and philosophical, but falls flat.