Going in, my main concern was the runtime. Now sure, you do feel the 4 hours, but it's not like it's a boring film. At all. For 4 hours, it paces itself quite well. It has very entertaining moments, as well as moments that drag on a little, but not to a degree of boredom, it's all very atmospheric so at least if the dialogue doesn't interest you, you have pretty desert scenes to look at.
It's a fascinating watch…