I'm with Telstra... have been, since 1967. Have home phone and internet plus mobile.
Never had any issues.
As I am only 150 metres from our exchange, I get very good broadband internet speeds, commonly 2.4 Meg per second, altho just recently late at night when they were testing the exchange capabilities in preparation for the NBN changeover, I was getting download speeds of between 18 and 32 megabytes per second..... I downloaded 8 complete movies in just 11 minutes!
Cheers, Kev