For those within the Optus 5G Coverage Map, I think it's a good deal as you pay the equivalent of NBN 50 price, but getting NBN 100 performance. It is essentially Optus 5G network, Spintel offers $10 off first 6 months ($60pm) on a 24 months contract ($70pm), cheaper than Optus.
Optus direct is $75 per month on a 24-month contract, first month free (Shopback $55).
Only Optus wholesale to MNVOs. There are no MNVOs for Vodafone and Telstra 5G.
Nokia FastMile modem rental included.
YMMV. They advertise average speed of 147Mbps download but my friend in Sydney is getting 30-120Mbps, with the modem in the optimal location in the house (LED indicator green). He's usually getting 30-50Mbps peak, 50-90Mbps off peak.
Latency is better than 4G, around 35ms, not quite hard core gaming standard but ok for average use.
Upload is quite good, around 50Mbps (twice the speed of an average NBN 50 plan), great if you back up large files/photos/videos to the cloud often.
There is a satisfaction guarantee clause:
If at any time during the term of your 5G Internet plan you’re not satisfied that you are getting download speeds of at least 50Mbps, or you cannot receive a 5G signal, simply report the issue that you are having to us and we will investigate the issue and check if it’s within the terms of our 50Mbps Satisfaction Guarantee (Guarantee). If it is, we will confirm your eligibility to cancel your contract without cancellation fees under this Guarantee. You must return the supplied 5G device to us in good working order within 30 days of cancellation.