"Not as bad as you'd think" is not a very convincing way to start a review, I admit, but this is a movie that had a lot going for it. A lot of potential, but not completely wasted. The scrip, including dialog, is rather intelligent. And the smartest thing the film's creators did was cast Brynner, von Sydow, and Smith (who is one of the most underrated bad guys in Hollywood. I wish Tarantino would rediscover him the way he did Travolta, Keaton, Forster--and just about half the main characters of most of his films, in fact). Perhaps, though, the stars' salaries left little money for sets and costumes, which are pathetic. The lighting is about as atmospheric as a dogfood commercial. Sadly, director Clouse's usual flair for fight scenes is, with the exception of a couple of nice touches here and there, absent.
Interestingly, "Day of the Dead" borrows heavily from this film, from the basic storyline (handful of survivors of apocalypse fighting against one another as a handful of them plot escape) right down to the cauterization-with-torch scene and the island-as-escape-from-wordly-chaos theme.