I no longer always accept the orthodox psychiatric view of demonic possession and potentially see this (for example) in people throwing women under buses. I'm not saying neurological problems don't exist but I often see a spiritual problem in those often diagnosed with schizophrenia, bipolar and temporal lobe epilepsy.
I was born in Germany and lived there during the time this movie is set in around 1976. In this respect it was quite a nostalgia trip.
Sandra Huller is once again a great actress who seems to convey a lot while often saying or doing very little.