I really enjoyed this movie. I won't lie to you though it isn't uber-brilliant, deep or ultra-funny. It is the sort movie you watch late at night when your expectations are low. If you're looking for a movie that doesn't make you think too much this is it.
That being said I did find it funny, if somewhat puerile at times. I could relate to the main protagonist. The story moved along at a good pace and didn't get bogged down. I really wanted to see how it would end up.
I like that it didn't suffer from the usually Australian movie problem of "lets show you how uniquely Australian we can make this film" it just let itself be. It showed a side of Australia that wasn't purely rural or suburban.
Also Rose Byrne is absolutely gorgeous. I think I want to marry her!