We had the best time at Joy and Ian's place!! The best Airbnb experience we've had (in NZ or otherwise). Their house was easy to find and seemed very modern. The room has a separate entrance, and is very private, and had everything you'd need for a comfortable stay. There's even a huge walk-in closet for storing your luggage! Even though it was very cold outside (got as low as -5°C in the morning), the room was warm and cozy. An assortment of tea, coffee, bread, milk, breakfast cereal, instant noodles etc. were generously provided in the room. You can also ask ahead of time if you are interested in using the kitchen.
Joy and Ian were exceptionally welcoming, very good about communicating with us prior to our arrival, and gave really good advice about sight seeing and hiking around Wanaka. We really enjoyed talking with them, and hope that we can visit them again some day!