A very nice story, and although the ending is easily guessed once all the players are introduced it still makes for a pleasant viewing. What amazed me (after thinking about it) were the very few locations used in the film - or so it seems. Mostly were carefully decorated interiors and only very few large outside shots.
It is one of those movies where the viewer is also "conned" - I wonder what I would have felt if it didn't have worked so smoothly as here.
Newman adds a surprising layer of complexity to his character - you always sensed that there was something going on behind what he said.