Very good location for those are going to Pinnacles, Cervantes and Lancelin as well as Yanchep National Park. We stayed there after that trip and had a great shopping experience in Joondalup. That place is like a separate apartment though Mitzi stays in the same compound (corner lot).
The unit can comfortably accomodate 3 pax (1 double bed and 1 sofa bed). The kitchen is very complete with cooking utensils and even a little cooking oil. Mitzi also provided milk, cereal, butter and bread for breakfast. Bed is firm and comfortable, good for those who have back problems.
Opposite the property is a park with many trees and a playground which is suitable for kids. You can sit on the chair outside facing the park while sipping coffee too. That place is very quiet.
Takes about 35 mins to the international airport on a slow drive.