Implementing IPv6 at at ISP in New Zealand requires (and this is not a complete list)
- Deciding on your end subscriber address space allocation, do you want to do /64's or /56's and should they be dynamic or sticky per customer?
Realistically would it not be a nobrainer to do static/sticky rather than dynamic in the first place. Considering how IPv6 works for the internal network.
The biggest issue with snaps ipv6 is the dynamic allocation, on an unstable connection that just causes a mess!