The people who commented obviously loved it so much. So did I. No movie can be perfect, and anything with a strong nautical theme is very, very hard to get looking right. Look at all the pirate movies where it is obvious that a period ship, recreated at huge expense, has its sails hanging slack and is being propelled through the water by engines. There was a Columbus movie not long back where the bottom edge of a sail was flapping round his face while he said something deep and meaningful.
RofS is one of the few films that manage to sustain realistic nautical action and atmosphere right through. My only very minor quibble was that in the scene below decks where Clara puts on the kettle, there is far too much space above her head. But that could not detract from the "awkward English chap" conversation Arthur has with her.
Of course anything with Jenny Agutter in it is a good movie, but with Jenny and sailing boats as well, this is one to love.