That said: Everyone who switches one way or the other claims savings. Their breakdown of savings raises questions. They have 15,000 machines and TFA says they'd be paying €280 a seat for Office upgrades and €173 a seat for Windows upgrades. I have worked for Windows companies with less seats, in the commercial space, that paid less.
I also want to know what the workers think. I've tried OpenOffice but find the spreadsheet unusable compared to Excel. My low productivity in OpenOffice makes Office a bargain.