Plenty of things to see and do for a week or so, and obviously cool to see the world-famous sites, but after the novelty wears off, it's just another souless, arsey, expensive, busy metropolitan nightmare anywhere close to the CBD! Much nicer to stay out of the CBD (Coogee/Newtown etc.) and just rely on the regular public transport links. Worth visiting, and plenty of the people who live here find the good places and love the city, but I wouldn't advise staying more than a week. Go to Melbourne!