The other night i did Lax Syd with a A380 in front of me. As i had some spare time i had the dispatcher provide me with the t/off weight and burn off for the 380. Working from its empty weight and comparing it to my own flight the 380 was 5% more fuel efficient per kg of payload not passenger. From the customers point of view it is an absolute winner. Ive traveled in business class myself and it was fabulous. No need to pay for first class if you get business on the 380.