During a month long trip to Australia, we had three different hotel stays in Sydney. Two were at the Sydney Hilton (the third at the Four Seasons as part of a tour). The room appointments and hotel services were fine and we enjoyed breakfast buffet in the Glass Brasserie.
The location of the Sydney Hotel is close to all central business areas sights, but does require some walking capability. In addition, there is public transportation close to the hotel that can reduce some time and effort.
During our stay we had a few lunches and a dinner at the Bistros on Five, in the nearby Westfield Mall. We also had a dinner at Doyles on the Wharf during our Sydney stay. The Bistro meals were reasonably priced and offered a good value.