LibreOffice is a nice thing until you get really serious and your day depends on a good office suite.

MS Office is complex, full of bugs... but it has all the things in place that a power user needs. They gave a big though about the things people need. The CTRL+Y after a CTRL+X on excel is a great example of that.

I have a love/hate relationship with MS Office. I would lave to have something better... but we're still far away.