Reviews provided by RottenTomatoes
New York Times:
It's hard not to appreciate two guys who can invest a cry of "Whoa!" with such pure ecstasy and who think that Joan of Arc is Noah's wife.
A riot of visual invention and weird humor that works on its chosen sub-moronic level, and on several others as well...
For those who appreciate dude-speak and bozo humor, this is a very funny film.
[The] filmmakers might have gotten more mileage if they'd rooted their adventure a bit more in reality.