This is a straight sci-fi book which served as the inspiration for Blade Runner (which I have not seen), and it deals with a lot of interesting themes, like life and cognition. The story was rather believable, and the conflicts seemed very human, even when dealing with androids. The reason I can't give it a 5 is because I felt like some themes went completely unexplored, and what I felt was the climax was resolved rather quickly in favor of a different plot point. I know I'm a flawed individual with poor taste, but I like what I like, and I wish the story had played out in a different way. Anyway, it's still very much worth your time, and it makes me want to seek out Blade Runner, which I hear is a classic.