As with every Hitchcock, this movie is suspenseful and tense from its start to its end. The concept of the plot was clever and its execution nearly flawless. Some of the shots were nicely composed and the camera movement was informative and unobtrusive. The music worked exceptionally well to both enhance the tension and set the mood. Unfortunately, I thought that the plot itself was a bit weak and a bit watery; it meandered and drifted with no real purpose or ending in sight. The conclusion took much too long and it seemed a bit of a stretch. The acting by the American was really over-the-top and quite painful to watch. Grace Kelly, on the other hand, was incredible. Quite a good movie, but Hitchcock has done much much better.IMDb link: http://imdb.com/title/tt0046912/