When I went to the Sydney apple store to buy a nano for my sprightly 74 year old mother I was impressed with how things worked.
As there is no counter I had to find a suitably uniformed person to ask about the desired toy. This guy disappeared and returned with a lovely silver nano still in it's clear plastic shell. Then I asked "where do I pay for this". The transaction was handled on the spot, excellent, and the tax invoice emailed to me, double plus excellent.
My only complaint. The man in blue needed to go and get a paper receipt for me to sign.