GW2014 and Windows Server and Hyper-V

I have searched the internet for some feedback using all these products together have not found much. Every time I find a virtualization blog it has to do with running SLES in the VM rather than Windows. Are there any down falls to this?

My clients are very small, So I thought that running all the Windows AD stuff services and Groupwise in a VM on the same server would be the way to go... Is it? Or would it be easier to run in the physical space?