Some critics, including Michael Medved, consider Plan 9 from Outer Space the worst film in the history of cinema. But others have rated the film more positively; many of them say the film is simply too amusing to be considered the worst film ever made, and that its ineptitude adds to its charm. Rotten Tomatoes states, "The epitome of so-bad-it's-good cinema, Plan 9 from Outer Space is an unintentionally hilarious sci-fi 'thriller' from anti-genius Ed Wood that is justly celebrated for its staggering ineptitude."