There are many well versed and intelligent reviews on this thread so I won't talk about the genre, message, vision or meaning.
All I'll say, is that I've never watched a film that has my total attention whilst making me laugh and making me feel physically nauseous at the same time.
It's a first for me.
Whilst the physical feeling isn't particularly welcome, it was well worth the watch! Ying and Yang feelings of the extreme.