I dock at the mouth of the Patawalonga River in Adelaide, South Australia. There are 2 marinas, one inside the lock, one outside, with about 100 boats in total (mainly sailboats, sports fishing boats and express cruisers).
I'm inside the lock where the berth fees ($220/month) are much cheaper. The lock isn't much of an inconvenienced as all occupants of the marina have their own remote control gate opener, so access is available at any time. Passing through the lock only takes 3 - 10 minutes depending on the tide. The lock has 2 retracting pedestrian bridges to allow uninterrupted crossing for pedestrians and bicycles.
The docks are floating concrete and kept in geat condition. Extras include free water & power; entertainment by a resident family of dolphins.
The position is good, being about 20 minutes from home and within a 5-10 minute walk of great beaches, many restaurants & pubs, hotels, a tram station, and shopping. Surrounded by plenty of happening things but still very quiet on the boat. Perfect.