We thoroughly enjoyed staying at Sandra's place. It was very clean, spacious, comfortable and well set up (so helpful to have 3 bathrooms!). The views out to sea are lovely and it's such a great view to wake up to. The sun room is a wonderful spot and a perfect place to sit in the afternoon to enjoy the sun and views. I highly recommend hiring the 7 seater car from Sandra. Horseshoe Bay is a little out of town and you'll need transport to get back into Oban. We tried to see the resident kiwi but unfortunately we were unsuccessful (though we know they visited by the large deposit they left on the back path!)
We did the Rakiura Track as a series of 3 day walks using water taxis and staying at Sandra's place each night. This was a fantastic way to walk the track and stay in a lovely place (and we didn't have to stay in the huts and carry full packs each day...).
Sandra was a great host and very easy to communicate with. Sandra and her daughter picked us up after our flight to Stewart Island and then dropped us back to catch our plane home, which was so helpful and most appreciated.
If you are considering staying in Stewart Island, this is a great place to stay.