Re: LibreOffice user here
The current version of LibreOffice is rubbish. If you want to get proper work done then you use Office. I personally think Office 2010/2013 & Sharepoint is fantastic. It's true that 2013 is only an incremental update to the excellent 2010 suite, but the best just got better IMO (been using it since it was available on TechNet).
Everyone seems to bang on about the cost, but at work our licenses will allow all of my 55,000 users to upgrade from 2010 to 2013 so it's certainly not costing any more money. The only cost will be the local divisional Admin's time if they choose to upgrade to 2013.
And in my home I'll definitely be subscribing. I have 5 machines at home, just sold my two Home & Student versions (3 licenses each) of Office 2010 for a combined cost of about £110 which more than covers the cost of a 1 years subscription. And when it comes to renew this time next year £79.99 is hardly a big deal.
I just hope MS pull their finger out with the Mac version. Whilst I don't have any issues with the performance of Office 2011, I have major complaints about the horrendous UI.