Van Warmerdam is one of my favourite directors and his latest movie didn't disappoint, in fact it might be one of his best.
As with most of his other work it's a surreal dark comedy, it might also be considered a thriller and has supernatural elements.
People who like their movies to be served with explanations and don't like ambiguity might be angered be it, but I think that even if you don't think too much about the social and philosophical implications it's an entertaining and often funny film, with lots of twists and turns.
The themes might be similar to Pasolini's Teorema or Miike's Visitor Q, but generally it's pretty original.
It's best not to know too much about the plot and just watch it and let it unfold.