Probably 3.5. The occasionally-disjointed episodic nature showed its age (the mcguffin was found by a minor character off stage!). Despite that, the parade of strangeness and inventiveness was really fun. Also, the question of what was real and what was not was always blurred, which I approved of. If you weren't reading this aloud, you could probably knock it out in a few hours. Worth a short trip into Kay's early 20th century England.