I used Microsoft Office 2003 a long time, didn't klike the ribbons of later versions, plus didn't want to support the prices & license policy of Microsoft. Later searched for good alternatives. I tested ALL of the mentioned office suites plus a few others, and the best one is SoftMaker Office by German developer SoftMaker. Yes, it's not free like e.g. LibreOffice - but you get THREE licences for $99 and it's so much better than LibreOffice / OpenOffice! Way faster, much better compatibility to Microsoft Office formats, better UI, ....... it's worth every single penny!
Btw., SoftMaker has a free office suite, too: www.freeoffice.com
Not as good as SoftMaker Office Professional (less features, no mail client) but still better than LibreOffice and OpenOffice in most parts.
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