Open Office was 'taken over' by Oracle's Apache group, by the way.
It's unclear how firmly they slammed the door on the open-source developers but a good many almost immediately delivered Libre Office, and Oracle never chased after them with patent pitchforks or Applesque lawsuits. Then, a couple of months ago, those departed developers delivered an updated Libre Office, too.
I used Open Office for several years, and have the newest LibreOffice installed on recent computers and don't see any differences, so I believe either will be a good alternative in the future. I might stay out of Oracle's path and avoid OpenOffice, but that's the only reason - not for any useability factor.
The Google Docs offer good compatibility too if you're in an Always Connected world. They do have file-size limits, however, and those aren't always clear until I try to save something too large. "Gee - thanks."