I run this on my home network. It is pretty difficult to set up as I was not able to dig up really satisfactory documentation. It must be said also that I am pretty inexperienced with AD at all so there is that.
I recently switched all clients to Linux and plan to abandon this approach as I was after proper user/authorization management between my Windows 7 clients and a Linux based NAS. With Linux the integration via ssh/sshfs is much easier and fits better to the Linux authorization model.
As a comparison: Setting up AD properly on all parts did cost me at least several weekends. Setting up sshfs only few hours. And the latter is much more responsive...