Latest version of SMBR

Does anyone have any more technical information on the latest version of SMBR, e.g. what new features exist in new version compared to old. Benefits of upgrading etc, I urgently need this, I've been trying for months to get this information from NetApp UK Sales, and I've failed, I need urgently for a client, which has an older version of the product. Other than the pdf download which is currently available.

Does anyone have any documentation?