Our first and only letter of special thanks was sent to Air New Zealand a few years ago now. We were especially pleased with several aspects of their service, including a decision by the Captain to delay cabin service by a couple of hours due to an especially interesting transit through the ITCZ. We received a very nice letter in reply from management. A great company - we look forward to flying with them again. Unfortunately our subsequent travels have been on routes which, given our logical and local point of departure, do not conveniently allow ANZ consideration.