Kurt Halfyard’s review:
Ego. Shame. Fear. Guilt. All are underscored here insofar as problems can spiral out of control when people push each other to the limit. Even moreso, A Separation shows the true ineffectualness of any bureaucratic legal body to sort out problems that are best suited to dramatization. Thus, we are armed with the God's Eye view, and A SEPARATION appeals to logic, empathy, and yes, judgement. It's the Iranian version of THE SWEET HEREAFTER, in its own way, and damn if that isn't a compliment of the highest order.
I had a plethora of reactions to the film and all of them, I believe, were earned. That is to say: the film doesn't 'cheat' (sorry for opening a can of worms) by going all Lars Von Trier with its plot points.
And that ending is perfect.