We stayed for a night at Aneta's apartment overlooking Lake Hawea. Our family of 5 fitted nicely for the night but probably would have struggled for any time longer. The flat itself is clean and well maintained with an amazing view of the lake.
However please note that it is in Lake Hawea. The description says this in the first lines and describes the time it takes to get to Wanaka, but having never visited New Zealand before and that the listing appears in Wanaka we assumed it would be much closer. It's completely our fault but it took us by surprise initially and next time we will probably in Wanaka. The town at Lake Hawea is much smaller with far fewer amenities.