I had this question after watching Make Windows 8 Look Like Earlier Versions of Windows with Classic Shell
I consider this program a must have. However, it can cause problems if the Windows 8 computer is on a domain that is managed by windows small business server 2011 and possibly other server versions. I found that folder redirection and synchronization of off-line folders did not always work correctly. When I accessed my documents from multiple computers, they sometimes showed different versions of the documents, not necessarily the latest. The problem resulted from this program's default settings for certain user folder locations. I believe this is alluded to in the README. Has anyone else had this problem, and is there a workaround?