Meh. It was alright. The part about how Tierry conned so many into believing his brilliance, was neat. It's funny, he treated his art show almost as if he were running a film set - with so many (far more talented) artists working beneath him. Completely capitalizing on the snobbery of others - that's the aspect about the film that I enjoyed. But was it really a con if people truly enjoyed his work?
The only thing that the film really proved was just how dumb and materialistic the art world can be. To which, I say "No shit".