The most valuable feature for DocuShare is that it has a very user-friendly Windows client. You can easily deploy the client and map the DocuShare site to a drive. Saving on that drive automatically uploads your document to the DocuShare site.
Documents are easily exported and versioning can be done out of the box. The product is superb if you are just looking for a user-friendly Document Management System (DMS). File and folder security policies are easily implemented and can work directly with capture systems such as Kofax Capture or Kofax Express.
Workflows are easily deployed.