I viewed this film today in a cinema, where it was being screened for Holocaust Memorial Day in the UK. In many ways it's uncinematic - though some still images around the KZ complex linger terribly in the mind - and the hand held footage almost makes one feel sick, until you get to the gas chamber, in particular, and such early quibbles are made to look utterly out of place.
I was profoundly moved, in particular, by the two tour guards who feature most prominently - one older man with a self-confessed 3rd Reich 'addiction' who questions the price he pays for his work, until he sees a swastika scratched into the wall of the gas chamber, in place of a memorial photograph torn away by some tourist as a grisly souvenir - and one much younger, whose motivation and commitment perplexed me, until at the end questioning reveals that he is serving time at the KZ as an alternative to compulsory military service, and that his grandfather, to his stoic and deeply human comprehension if not acceptance, was an SS officer himself.
As a teacher I am not sure how to best use this, or with which classes. Some of the 'processing' descriptions are truly stomach-churning and would probably require parental viewing consent. Yet in terms of lessons to learn, the continuing need for these lessons, and the sensitivity required in teaching 20th century German history - that is, sensitivity towards all who survive from whichever side of the experience - it offers huge possibilities.
Perhaps not an easy Sunday morning's viewing, but a necessary one.