I'm comfortable with IPv4 address space allocations. By which I mean: Given services to plan for, or an organization to network, I have a good grasp of how to plan IP address space usage. (or at least, I think I do. :)

Are there any best practices guidance, or case studies, for IPv6 address space layout?

The layout that we are using for our rollout is:


/48 per customer
/56 per customer site (as a subnet of the other /48)
/126 for all point-to-point links in the core, these are all subnets of a /48 used for all core links


These sizes are mostly taken from the RIPE advisory here.
