This is a classically made thriller, a very good remake of the 1955 Alfred Hitchcock movie. A very wealthy Wall Street financier (Michael Douglas, powerful and threatening) suspects his wife (Gwyneth Paltrow, beautiful and rich as well as vulnerable) of having an affair with an artist. With something like inexorable logic, the story moves forward, still succeeding in surprising you, the viewer.
The acting is very good and there is real tension throughout. The lead characters as well as the secondary ones are all plausible, which surprised me since, usually, in such stories, suspension of disbelief is a pre-requirement. Not here. You buy into the storyline and you understand the characters' motivations. For all these reasons, I recommend this entertaining and gripping film.