It offers to mix and match different airline one way tickets so that you can buy the cheapest return flight ticket
(flying with one airline on the way out and either the same airline on the way back or if it works out cheaper, a different airline coming back)
This should save you money on flights. We have been recommending for some time at Kiwimoneysavers.com this approach but there hasn't been a website to make it this easy before. They do charge for this service ranging from $4.95 - $24.95 per person
Check out many more ways to Save Money in New Zealand