Seriously unfunny, cliche addled rubbish, I can only assume that the many drugs portrayed in this dross, were real. It's the only thing that would explain why any of the creative's involved thought this was a funny film.
The ironic fact of this being about a bad film which over runs it production time and the actors feel that they will never be finished with it, was not lost on me. At over two hours run time, trust me, you will feel the characters pain, in so many, many ways.
In conclusion, never have I seen so much talent squandered on so few laughs in such a truly awful script. Maybe the industry, in jokes were just lost on those not in the industry i.e. us, the viewers.