The speeds are perfectly fine, the pings are great, and I've never had trouble with congestion.
The big problem, though, is the crappy plans. I know you've said you don't care about prices, but $90 for 25GB (my current plan) is an absolute ******* rip off. With Internode or Optus (or basically any other provider) you could get close to double that for the same price. Telstra Bigpond is pretty much the only provider left that hasn't moved to an on-peak / off-peak system, and that still charges you for uploads.
If you aren't a heavy downloader, Telstra cable is fine. If you are, go with someone else.
And if you do go with Telstra, MAKE SURE you do not go on one of their plans that charges you for additional usage. They charge 15c per megabyte over your usage limit - you can easily rack up excess usage fees of $250-$1000. Make sure you pick a plan that caps you once you reach your limit (although, playing any game + being on vent while capped on cable is virtually impossible, even if you're on their "extreme" plan, which supposedly gives you a higher capped speed).
Posted on Thursday, 6th August 2009