Original sentence: For example, the change from the menu bars of Microsoft Office 2003 to the ribbon toolbar of Microsoft Office 2007 caused mixed reactions.It was claimed to cause "anger and frustration," and "major efforts in time, training and costs",   while average users found improved productivity
Edited sentence: For example, the change from the menu bars of Microsoft Office 2003 to the ribbon toolbar of Microsoft Office 2007 caused "anger and frustration," and "major efforts in time, training and costs"