For home use...
For home use the subscription is a steal. I do not currently have any version of Office on any home computer. With my wife and kids all having their own computers, and the kids needing to use Office more and more for school, the subscription service makes the most sense. I do agree with donyurchuk that if you own an Office license or manage a Microsoft Office environment at work upgrading doesn't make sense. Office 2010, or even 2007, are great products and still very much usable.
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