We have Libre Office on our Linux box and it runs very well. It has all the features most users will ever need and is fairly compatible with MS Office. My wife has to share docs with Office users and it is OK for typical docs but for highly-formatted docs she still uses Office (which is running under Win 7 in a VM).
I believe Libre Office is a fork from Open Office but I'm not sure why the Linux community use Libre Office. Perhaps it is better supported?
