A thoroughly decent movie that respects the audience. Some great locations, mostly in Athens. It's a three-hander, and in retrospect the chemistry between the three of them could have got under the skin a bit more, rather like in Knife in the Water. As with Patricia Highsmith's other works, a key theme is male one-upmanship but it doesn't play out here quite the way it ought to, especially with the final pay-off, which is nonetheless quite satisfying.
Nothing wrong with any of the performances, and the twists and turns of the plot work well, but if you can't really sympathise too much with the characters, the director ought to have a more mischievous style perhaps, rather like Hitchcock of course. So this is a film that won't wind you up much, but won't ruffle your feathers either.