I have just seen this film, and my opinion of it is mixed.
On the one hand, the film gives a detailed and intimate view of Mongolian life, especially in the first part; moreover, there is a strong political message behind it, which leads to some disturbing and powerful images (nothing too shocking).
On the other hand, everything is filmed in such a tediously slow manner that it becomes either mesmerizing or simply boring. Unfortunately, in my case, the whole audience including myself were not mesmerized. Moreover, toward the ending, the film becomes more and more surreal, which for me personally did not lead to a satisfied feeling at the actual end.
All in all, if you enjoy watching empty lands and silent people for a long time, you may be able to enjoy the positive aspects of this film. If, like me, you like films with at least the outline of a well-defined story and the feeling that you somehow understood what you just saw, this might not be the film for you.