When I switched to OpenOffice.org in 2006 it took me some time to switch, and you know what? I have found that OOo was way more stable, predictable and logical in how things are done. It was also really free as in freedom, and I could run it on any OS of my choice. Now, I know LibreOffice like the back of my hand and it's wonderful.
People who used MS Office all their life usually do this: launch LibreOffice,see different interface, and like "nah... I don't want any changes, I'd rather keep myself and the world vendorlocked into proprietary software".