I'm usually not one to criticize others' opinions of something like a movie, but I really feel like some of the below comments didn't really get the movie. Yes, it's deliberately confusing to induce a state of panic and desperation much like how Jess must feel.
To the comments saying things like "why didn't she do this/that/other to break the loop?" - because it would break the greater theme the movie is trying to convey. Jess only really has one opportunity to escape her personal purgatory and that's by not leaving the cab driver (alluded to be Death himself or a ferry to death/afterlife) but instead she is trapped by her own guilt and thinks she can change the past - which we all know is an exercise in futility like Sisyphus' fate. Her experience on the Aeolus is an exploration of self-reflection, confronting herself (sometimes as a supremely evil person) over and over again. The final and most stark confrontation being at her house towards the end of the movie.
It's a classic tale like that of Jacob's Ladder about being able to let go of things holding you to life (in the case of Triangle, guilt over being a bad mother and responsible for her and her son's death) before you can actually fully make peace with your life and die.