We had a lovely stay in Wanaka. The location was great, we loved being walking distance to everywhere and the sound of the creek running by the apartment was delightful. There were a few small oversights with a couple of amenities for our group (not enough towels/chairs) but this was quickly sorted by our hosts. The sound does travel down from the apartment upstairs particularly at night (more than we had anticipated), so if you need lots of quiet i would recommend booking the top floor apartment over the ground floor.
All in all, a great little apartment in the heart of Wanaka.