Such an amazing, private getaway! Nothing beats being surrounded by vineyards for a week away with a only a quick drive to Margaret river or to surrounding wineries!
The only thing I would say would be to make sure you bring some form of entertainment (games/ dvds) as the lack of WIFI really limits your options for things to do in the evening. Also the prices for linen were quite expensive so having to bring your own added another step to the trip.