I think it is worth mentioning that Azure offer something similar with Samba / CIFS/ SMB protocol. [1]
This is the underlying tech that powered their Docker volume plugin as well [2]
I'm using in production for serving up small images to some web servers, and I'm currently in playground with docker stuff.
So far, so good. I'm impressed.
[1] https://azure.microsoft.com/en-us/documentation/articles/sto...
[2] https://azure.microsoft.com/en-us/blog/persistent-docker-vol...
edit: footnotes