Look the dogs b**locks if you ask me, and a very smart way to get more economy out of an old airframe. It's a win-win... they look good and they improve efficiency. No doubt they also improve takeoff performance allowing for lower takeoff thrust settings. Air NZ management are by and large demonstrating a good level of innovation during these tough times. I don't think they will be going to the wall any time soon. PS I don't work for them.