This place occupies one of the most awesome corners of the South Island of New Zealand. If you've managed to find it - book it. Bring some supplies (food, a book, sunscreen, trail shoes) and just get out there! It's a bit of a drive down a very-well-maintained gravel road beyond Pakawau, but we did it in the pouring rain in a rental Camry without any issue (or even nervousness - the road is that solid).
Monika met us when we arrived and showed us the map of their trail network - walk/hike/run every inch of it! The landscape and their access is simply stunning. The house has plenty of space for a small family, a big bathroom & good kitchen, and I even managed to work out in the empty space in the attached garage (where the laundry machine is) on a rainy day.
Simply put - book it and unplug in a stunning spot. Thanks, Monika & family!