OpenOffice is fine generally, but a few provisos... 1. Excel requiring sophisticated shit. Personally, I never had a problem with it (don't require sophisticated shit). Those who do consider it unusable. 2. Either Word docs or Powerpoint presentations with detailed templates/formatting....it's not great at dealing with those. We used to have a few clients that had paid designers to come and make very detailed, well laid out house styles. OpenOffice does not like those at all. For general other use, it's fine.