Also one new limitation is no single location can have more than 25 VMs. We were an early adopter of ROBO and vSphere replication and both have been a huge failure for us. Every version of vSphere has substantial changes to replication that also has had negative impacts on us. We use vSphere replication for a few dozen remote locations where SAN based replication would be cost prohibitive. I will give it to MS, they are working hard to make Hyper-V a good solution for ROBO locations and if vmware does not take its head out of its butt they will never win in the ROBO scenarios