I have no Windows machine at home, only Linux, so I use only Libreoffice. I have access to M$ Office at work, but I usually use LibreOffice there, too.
And a big hooray for package managers. I could go crazy everytime I need to install something on Windows, which means: Google it. Download it (make sure that it is actually the real deal). Wait for download to finish. Install it (make sure it does not install all kinds of random bullshit). While installing, have to click "continue" or whatever at random points. And accept some EULA that nobody understands anyway.
On Debian usually:
aptitude search <whatever>
aptitude install <actual package name>
And everything else runs in the background and I don't need to bother about it at all.