It took me a while to work out what i think about this. I didnt really like the way the plot developed and by the end it was ridiculous.
I stayed for the Q&A, which shed some light on things since an actor talked in a rather pretentious fashion about the director opening up a space of rich exploration for the cast. Oh luvvie how marvellous!
But here is the thing. Despite the film being realistically shot this desire of the director to have a loose plot and to let the actors go where they want means that in the end the narrative nosedives and it goes implausible. Shame!