I have not been on a Royal Caribbean cruise with an outdoor theater (will be traveling on the Oasis next month and evening movies under the stars will be a must for us). But I was on a Princess Cruise with an outdoor theater. When I first heard of the idea, I thought there is no way that's going to work because of all the wind and the other sounds. You won't be able to hear the movie. But it was amazing how well the audio was adapted to the natural sounds on a cruise. We heard even the quietest dialogue crystal clear. If Princess Cruises can do it, I can't imagine that Royal Caribbean won't be even better