The VM data is restored (VHD and support files), but it does not register the VM with the Hyper-V / Cluster service. End up having to recreate the VM structure (RAM, Network, etc.) and then add the VHD as existing drives.
It could be possible I am doing something wrong, but I have followed what I could find in the admin manual. Worked with the older 12.5 against a non-clustered 2008 R1 Hyper-V.
BTW, anybody know how to delete old (hidden) nics inside the VM? It creates a new one each time you have to go through this process. My test machine is up to "Local Area Connection #8"!