We had the opportunity to spend a weekend at the InterContinental Sydney so we jumped at it.
InterContinental Sydney, located a short distance to the Harbour and nice and close to the Botanical Gardens. Rooms are comfortable but the city lights aren't blocked out that well
Opera Bar, with a great view of the Opera House and Sydney Harbour Bridge
Miss Chu's on George, fabulous Vietnamese influenced street food
Hyde Park Barracks Cafe for breakfast
Drinks at Quay Bar
While it may look like all we did was eat and drink (and to be fair we spent a fair amount of time doing such!), the Sydney Festival was on so there was a few places to see things if you had tickets (which we didn't) but I would recommend you do so if ever in town around the same time.
For other place to stay, eat and see in Sydney check out some of my previous posts here