I’ve seen many movies on the Holocaust but this one, by Hungarian director László Nemes, has to be the most horrific. One imagines with difficulty a more nightmarish commission than that of a Sonderkommando at Auschwitz-Birkenau. The film is a tour de force, as is the performance of Géza Röhrig, who plays the protagonist Saul (and is in almost every frame). French reviews (tops) are here, US-UK reviews (also tops) are here (and also here). If you have the opportunity to see the film on a wide screen, do so. And if you can on 35 mm, so much the better. Trailer is here.
UPDATE: Christopher Orr, principal film critic at The Atlantic, has a review, dated January 17th 2016, “Son of Saul and the intimate mechanisms of genocide.”