I recently moved from an old Dell Windows machine running Word, Excel, etc (and performance was great) to a new Mac with Office 365 but Excel is really terribly slow. From reviewing various forums it seems that Office 365 seems to have quite a few performance problems so I am seriously contemplating stopping my Office 365 subscription and installing Office 2011 whilst I can still get hold of a copy. Does anyone have any experience of running Office 2011 on Mac (with Yosemite)? What's the performance like? Or is it worth sweating it out and hoping Office 265 improves?