We can definitely recommend this place for anyone wanting to visit the Geographe Bay area. Karen and her family are super friendly and helpful. They even provided a cot for our 3 month old baby and let us use their bbq on their deck with a beautiful view. The cottage was perfect for 3 adults and a baby, the beds were really comfortable and the kitchen has everything you need. The only thing that is maybe a little uncomfortable is having dinner in the sitting area (as it was too chilly to sit outside).
And the beach is only a few minutes walk, perfect if you wonna see the sunset while drinking a beer/glass of wine after a day of exploring the region. It's close to Busselton Jetty and close enough to the Naturaliste area if you want to visit vineyards, breweries, beaches etc.
We would for sure go back!