We had a great time in the Port Geographe Marina. We used it as a base to travel around the surrounding area. The small dog "Buddy" had a wonderful stay and thoroughly enjoyed the beach! If you want a long walk it is possible to walk to Busselton Jetty - we only did that once and drove the rest of the time.
Davinia was most helpful - our first choice property from Davinia was unavailable but she offered another one immediately. Davinia also provided some assistance when we first arrived to locate the property and even gave us a canoe to explore the canals.
The property itself is modern and targeted at families with the associated heavy use. During our stay, there was some construction directly opposite during the week but we just started our days earlier.
Overall, a great location to spend a few days.