Seems an alright deal i think it's the lowest for the 100/40 plan i've seen.
nbn 100/40 $65 for 6 Months + 50% Cashback with TopCashback @ Southern Phone

80
Related Stores
Comments
correct
This is a very good deal…though there are some atrocious reviews for Southern NBN online. But I guess that's the case for many providers. I ended up choosing Exetel 100/20 for $65.99 a month with $100 cashback.
Anything about IPv6 support and CGNAT opt-out?
No IPv6 Support.
CGNAT opt-out was painful (required multiple calls).
50% cashback on first month only?