Taronga is a world-class zoo. Although it has a wide range of animals, the main attraction is the comprehensive collection of Australian natives. Exhibits are well done, although a few could use updating.
The VIP Gold Tour is well worth the extra cost. Requiring advanced reservations, a small group (max. 6) is guided through up-close and personal encounters with a good variety of Australian wildlife. Other visitors were jealous to watch me and a family of four petting echidnas and getting our pictures taken right next to the koalas. The two guides were highly knowledgeable and very friendly.
Taronga is rightly known as "the zoo with a view." Some of the best views I had of Sydney were from there. The Sky Safari cable car to and from the ferry landing gives some you won't get any other way.
The zoo is rather hilly and can be quite tiring to walk around. Give yourself plenty of time to explore. Those with mobility difficulties might want to consider a wheelchair.
Entrance to the Taronga Zoo is included in the Smart Visit card.