This is the ideal place for a group to stay in Arthur's Pass. You're close to the visitors center, cafes and many of the start points for hikes. We did the Avalanche Track up and Scott's Track down, and it was intense- only recommended for very fit, experienced hikers who want a spectacular view. Devil's Punchpowl was a nice, short hike with a great view of a waterfall. As birders, we loved that we could hear Great Spotted Kiwi and Morepork from the house and came across kea throughout the area.
The house itself was well equipped, with a new luxurious bathroom (awesome shower) and a well stocked kitchen. You will likely want to stock up on groceries and gas in Christchurch or Greymouth before getting to Arthur's Pass because there aren't any stores and the two cafes close early. We cooked all of our meals in the house and enjoyed the Nespresso machine. Very comfortable beds and warm bedding. Highly recommend Michael and Marion's place!