This is really a well-executed period piece from the '50's that actually works well in the theater due to the outstanding locations and cinematography, but probably does not at home due to the pace (deliberate) and the need to pay attention. The movie does have some less than credible scenes, does have some gaps in information, but if you go with it, at the end of the day it keeps you revisiting some of the earlier scenes and dialog well after you leave the theater.
Does not rise to "great" by any means, and does tend to hit you with nuance like a freight train (several odes to Hitchcock, for example which are nearly comedic in their lack of subtlety), but in the end, a good movie to pass some time in the theater.