I know there are lots of horror stories about people having technical troubles when moving over to the National Broadband Network, but (at great risk of jinxing it), my change over from ADSL to NBN whatever-it-is-I-dunno seems to have gone very smoothly.
My house did have Foxtel cabling already (put in by the previous owners, and used by us for a while, but we stopped with the stupidly priced Foxtel maybe 5 years ago.) The NBN box just plugged into that cable, which sits besides the TV, and a broadband connection was made immediately. The modem plugs into that. I did have to ring the service provider to check where the password for the modem was, but I got onto someone immediately. In fact, I rang them in total 3 times today, and each time spoke to someone immediately each time. The company - Exetel. So far, I am impressed.
As for the speed test - on ADSL, the best download was about 9 Mbps (with a truly erratic upload speed of 1 or 2 Mbps); checking today on the NBN it was downloading at about 22 Mbps and uploading at a steady looking 5Mbps. I had paid for the mid-range speed service with "up to" 25 Mbps speed. So 22 is pretty good.
What's more, for the ADSL service, I think I was paying $40 a month for it, with 150 Gb a month download limit (not that we were ever using all of that, even with four people in the house each with their mobile devices browsing the net), but I was also paying around $40 a month for the Telstra phone line and calls from it.
With the Exetel plan I'm paying $80 in total per month, but with more than twice the internet speed, unlimited download, free phone calls, and free phone calls to several overseas destinations (in Exetel's case, including Japan.)
So, all in all, provided it continues to work properly, the NBN has been a valuable upgrade to my internet and telephone service.
I feel I ought to be putting myself forward for some advertising endorsement for either Exetel, or the NBN. Especially if they pay me!
Anyway, I will advise in future if the service goes bad. Let's see.