A friend and I stayed at the Kershaw house for 2 nights in early November 2012. The owners, Jill and Pete are not only very hospitable, but helpful as well. Pete recommended excellent sites to visit, and wonderful boutique vineyards in the area.
Jill's muesli is not to be missed; especially on top of her yoghurt with passion fruit! You will not want to skip breakfast while staying.
The home has a large Dining area, Sitting room, and Living room downstairs, complete with a computer for your use, a library, and a warm fireplace. The grounds are beautiful and picturesque.
The only issue we had was finding it (in the early evening). It is located in Richmond, not Nelson as Expedia suggests. However, the location is great as it is central to many tourist areas both north and south.
I highly recommend staying here. Of the 5 places we stayed in New Zealand, this was the highlight.