Memorable characters, a plot that sucks you in, great artwork, and sensible challenges make this a charming game.
For graphics, the game is a great piece of artwork, the style works so you may clearly tell what you are looking at. In addition, from the massive humanoid robot skull you enter, to a scarred landscape of wars past fought, the game is beautiful. Its great exploring the locations you enter yet you wish you could continue to explore more. Its a relatively small world, but at least its packed with tons of content.
The characters are fascinating to listen to and are all interesting figures. By far my favorite is Ever Faithful. Essentially, an armored priest, Faithful preaches Humanism across the desolate landscape and helps push one of the biggest themes of the game, religion.
Humanism is the robots worship of man and his teachings, including a direct comparison with a 'Robot Gospel'. Humanism though is shunned in the city and it's repressed. The themes in the game soon extend into politics and the long asked question "Is is the means to an end?". Several other themes and ideas make this an adult game that makes you think. That appears to be the main point of the game.
For criticism though, I found Crispin to be one of the weaker characters that sometimes gleams too much as a slap-stick side-kick. He even calls himself a side-kick. Also, his antics are sometimes inappropriate and spoil the mood of the game. For example, he cracked a joke after a character's death.
A few puzzles are frustrating and required a walk through but its mostly sensible where I was able to think clearly of what I should do. Crispin's advise was helpful.
Finally, the amount of references to other works is a bit ridiculous where it is too obvious and breaks away from immersion.
Though, that is merely nit-picking at a wonderful game. I hope they come out with a sequel or expand the story because it most definitely ended in a cliff-hanger.