This is basically an international student/recent grad house with 8-15 people, and the option to join in a rotating meal schedule for $35 by cooking for everyone once a week.
Travel times are a bit longer than advertised, but that's Sydney.
People are friendly, pleasant, and interested in chatting about different countries, travel, life, etc. Area seems quiet and safe, communication with host was good. There are also some nice cafes in Hornsby near the train station.