This place would be great during the summer, but it was the least enjoyable place we stayed in the New Zealand winter. It is as described in the listing and the owners were fantastic in trying to help (so much so that they even came out in the cold rain to help us find the house), but it was a rough couple of days.
First, the treehouse is on a narrow one way road that is shared by about 10-15 homes. This is narrow by even NZ standards, forget American standards. If someone comes down the road while you are going up (which happened), you have to reverse at an incline. We could not find the place when we arrived on a rainy night. Peter was nice enough to come out in the rain and help us find it. It's confusing because there are no other lettered homes, they are all numbers...and 41a comes between 41 and 43.
The other main issue we had was heat. Despite the small space heater, and wood fire oven, we were certainly not warm enough.
Otherwise, the space is perfect for two (maybe three) people during the summer!!!
We definitely would not opt to stay here again though just because it is about 25 mins from Wellington city and hard to find. But it would be perfect for a couple looking for a quite, more remote location.