My first reaction to this was "Great! playing tricky tricks you sneaky banks, you lovable ruffians, here, make some serious financial decisions for me"

Then i realised that it is a pretty interesting reflection of the industry that this campaign will probably work, solely because it stands out and brings NAB down to a level of mate, as in MAAAAAAAAAAAAATTTTTTTTTTEEE.

Banks, Politicians, Mechanics, all want to portray themselves as your friend to generate trust and then generate business.

The mateship which should manifest itself in customer service reflects only one element of a successful business.
I want to see politicians/banks/juice bars that have customer service nailed but follow that up with the knowledge and confidence of a professional.