Ping Pong offers good quality dim sum at reasonble prices. There is never a long wait for food although you can sometimes find yourself waiting to get a table at these popular restaurants!
I'm from Sydney and I've grown up on dim sum (`yum cha` there) so I can confidently recommend this place for those seeking good quality chinese.
A good venue if you're in a rush, with a large group of people, or looking to try a variety of different flavours.