Well this anime does a very fine job of exploring the fine line between humans and robots. It explores the idea that eventually robots and computers in general could develop very human like emotions and even freewill. It shows that as our technology progresses the line will become more and more blurred.
The animation was about what you would expect from a high end production nothing to complain about here. The everything from character movement to lighting was done excellently.
The voice acting was spot on. I think that some of the background music could have been a bit better but the sound effects were right on par.
Due to the whole premise of this movie the characters are what makes or breaks this anime and boy oh boy does it make this anime excellent. It does an amazing job with not only character development but also character diversity. There are many lovable characters and most of the main and secondary characters are well fleshed out.
This anime is for those of you who like psychological anime. This is a shining example of how to do psychological anime correctly. It's not only very engaging but it's also psychologically realistic. If you are looking for a happy go lucky anime that is easy going and fun this isn't for you but if you are looking for an anime that explores deep and interesting questions regarding what makes humans human and love psychological anime then this is an absolute must see.