An atmospheric thriller that works right up to when everything is revealed. When the film maintains its balance of "is it ghosts or is it paranoia?" the movie works. The claustrophic confines are used well, and the film is a fast mover. It's a slick thriller, with a terrific class, and I for one am I glad that a movie has stopped trying to convince us its actors, despite speaking all English, are "foreign" by using some fake foreign accent. Why does Harrison Ford, when he's speaking completely in English, using a "Russian" accent in "K19"? Beats me. It doesn't make sense, especially when we KNOW they're supposed to be speaking in their character's native tongue. We GET IT. There's no need to make your actors do dumb fakey accents.