It's very powerful in the sense that it can create humour out of one of the darkest periods of human history. The people behind the film really achieved a perfect balance of comedy, escapism whilst show casing the harsh reality of living in a country on the back foot of losing a war. The film really does not shy away from showing war crimes in particular those perpetrated by the victors really writing home the notion that history is written by the victors. I really didn't expect myself to enjoy this film, but it seems to just get everything right. Ingore the negative reviews because they really don't understand the message of the film.