Fantastic Imagery
Great symbolism. A dark and deep story interwoven into a single piece. Excellent art. I love that the dual sides are done in different styles. Makes the story come out at you that much more and makes a lot of sense considering the man's condition. The psychedelic style and coloring works really well, too. Even the "normal" or "real" side is good. It's so plain and clinical while the other side is so jumbled and almost angry.
Even if someone didn't know the story and interpreted it differently, the story would still be a good one and the piece would be thought provoking. It's just so full of emotion and information.
PS Dream Theater is a great band. Progressive rock/metal gods. I'm not a personal who is always in to such super-technical music (it can get so masturbatory and emotionless), but they make it work really well.