Brilliant, but difficult to explain why. No plot, no acting (well, except for one scene, but I'll come to that). So, it's a documentary then? Yes, sort of, but there is no narration, nor captions, nor even tags to let you know what or where in the world you are looking at.
In essence, it's a visual documentary on the modern world. Initially it just seems like National Geographic without any commentary: beautiful scenes of temples, nature and places you might want to go as a tourist.
However, 100 minutes of random places and things could be boring after a while. Just when you start to think that might well be the case, themes start to emerge: nature, buildings, opulence vs poverty, guns/military, livestock. Pretty much everyday things, and how they are connected.
It is basically a 100-minute stream-of-consciousness exercise, using amazing, totally natural visual imagery (ie no CGI). Enjoy it
for where it takes your mind, or just for the images and the drama of everyday life.
Only negative note is the one scene that isn't candid: a performance artist. Very pretentious and pointless and prevents this movie from being perfect.