We had the new NBN modem installed through optus approximately 3-4 weeks ago. The technician was on time as appointed, and quick to install. We have been with Optus for so long easily over 10 years now with a bundled landline and broadband package, which I think is great value for money.
With up to 9 people in our household streaming a Kodi box, streaming movies online, through games consoles, wifi usage on mobiles, ect pretty much around the clock, never skips a beat, speed is always consistent.
Having said this we have only had this connection for a couple weeks so will have to see in the long run how the pricing, service and speed holds up. The day after installation of the new NBN modem we had a technician/ subcontractor pop by rather early around 8:30am, he had to phone optus with the verification I'm guessing compliance ect, he was on hold for about 20 mins but could see I was in a rush so offered to complete the call from his van do I could leave. All in all happy so far.