Honestly, I expected a little bit more from Damian Szifron. If any of you had a chance to see his TV show "Los Simuladores" you know what I'm talking about. The premise is nothing out of the ordinary: An upper-middle class, shy guy goes completely paranoid when his girlfriend shows "cheating symptoms", hence he decides to follow her apparent lover all night long. Szifron manages the pace of the movie really well, which helps to convey the idea that something else is going on apart from the main plot. The latter is the only thing that gives some value to this thriller. However, the twist is not strong enough since the second plot point falls short from the audience's expectations. In the end, many things are left unsaid, the subplots are completely ignored or not developed and some things which might look like motifs throughout the movie, never come back or do not express any special significance. All in all: go watch it and see for yourself.