This is vintage Mike Myers (has there ever been a bad Mike Myers movie?). Mike Myer's characters, Charlie McKenzie and Charlie's eccentric Scottish father, carry this movie which would otherwise be pretty ordinary.
The best moments in the movie occur in the McKenzie household where Charlie's father steals the show. His brutal bagging of William (head) is among the funniest movie moments I have seen. The songs (women women, "if you want my body") provide material for many drunken sing-a-longs. I thought Stevie Wright was also very funny, but the ending was pretty lame.