disturbing film about World War 2

I came across (a trailer on the net) on this movie just by chance and have to say that the film surprised me. The film is shot from the perspective of 2 little boys and their experiences at the end of World War 2 and shortly thereafter.
Brutal, without make them stumble in just about any cruelty which had this time well to offer. If one then takes more background information of their own grandparents, as experiences of Kinderlandverschickung to blends all together into one image that is hard to beat on authenticity and a still speechless leaves behind. Clear recommendation so, but be careful not Popkornkino!