I saw God Bless America at the Toronto Film Fest last year and I was disappointed. It's very well made but I didn't find it funny, and the satirical targets are blindingly obvious. But on the other hand it's clearly heartfelt and personal, and I got to see the Bobcat Q&A. He's a cool guy.
I should say that I have a feeling I'm in the minority on this one -- it very well could be Goldthwait's breakout as a director.