We already deployed Backup Exec 2012 with some customers and all of them gave a good feedback about the interface, the better usability and simplified interface with an overall satisfaction.
They weren't so keen on the new interface for the first ...
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STS Symantec Backup Exec 2010
STS Symantec NetBackup 7.0 for Windows
STS Symantec Backup Exec 2012
STS Symantec NetBackup 7.5 for Windows