My Dad and I just spent a very pleasant three nights in Stewart Island. Rebecca's place is bright, light and comfortable. We particularly liked the open plan nature of the lounge, dining, kitchen with the sliding doors out on to the deck. The beds were comfortable and the shower pressure was excellent.
As many people have already stated, the hill leading up to the house is brutal. According to the DoC sign at the bottom of the hill, 450m straight up. We negotiated a car hire for the duration of our stay and were super glad for it. My 74 year old Dad really struggled to get up. The upside of the hill is that you are rewarded with some epic views of Oban Harbour when you arrive. The downside here is that you need to be standing up on the deck, or sitting at the picnic table to see them. Should you want to lounge on the comfy beanbags or sit in the lounge, all you will see is flax! They really need to go.
The cooking facilities are good. There is a great oven and plenty of pots and pans to build a meal. The 4 Square in Oban is well stocked and surprisingly good value. Sadly during our visit the BBQ was out of order - we were very disappointed with this. Note (at the time of writing) there is also no microwave either.
I can highly recommend the DoC walk around to Golden Bay which starts just at the back of the property.
All in all, we loved being on Stewart Island and Rebeccas house certainly helped with our enjoyment. Its a lovely new home with everything you need - its just at the top of a hell of a climb!