Intense. Real. = REAL INTENSE, dramatization of the 'fine line' traveled by those who must/may lead "separate lives"; and, the Improbability of the success at keeping them so.
Michael Shannon surely carries the role (and the film) with excellent "baddy" support from Ray Liotta & Robert Davi. Took me a while to recognize David Schwimmer - as there is not one ?hint? (in the character) from his days on "Friends" - Well played, David. - jts