They've written/directed some of the best/funniest/brilliant movies out there:
The Ladykillers
Intolerable Cruelty
O Brother, Where Art Thou?
The Big Lebowski
Fargo
Raising Arizona
to name a few and most of all, one of the best mob flicks out there:
Miller's Crossing which is nothing short of brilliant.
I think Miller's Crossing is one of the greatest films ever made, and the Coen Brothers' best.
