Some interesting camera techniques were used in this episode, conveying the disorientation of the characters in certain situations. What really elevates the episode for me are the eloquent observations made by the Medusan ambassador when he becomes one with Spock for awhile. What he says is one of the most poignant pieces of writing I've ever read in science fiction (or any fiction, for that matter):
"How compact your bodies are. And what a variety of senses you have. This thing you call... language, though - most remarkable. You depend on it for so very much. But is any one of you really its master? But most of all, the aloneness. You are so alone. You live out your lives in this... shell of flesh. Self-contained. Separate. How lonely you are. How terribly lonely."
The episode has interesting things to say about judging a being based on appearance.
"How compact your bodies are. And what a variety of senses you have. This thing you call... language, though - most remarkable. You depend on it for so very much. But is any one of you really its master? But most of all, the aloneness. You are so alone. You live out your lives in this... shell of flesh. Self-contained. Separate. How lonely you are. How terribly lonely."
The episode has interesting things to say about judging a being based on appearance.