Here are some useful links that may assist
MFAA
The Mortgage & Finance Association of Australia (MFAA) is the peak national body providing service and representation to over 11,000 professional finance brokers (mortgage and finance brokers, mortgage managers and aggregators) to assist them to develop, foster, and promote the mortgage and finance industry in Australia
Smoother experience as they have all your information.
Better understanding of your financials to provide tailored advice. 
Faster response compared to being matched with a new broker.
