There is definitely some mixed feedback, apparently for the users it wasn't actually that pleasant, some describing the switch as a nightmare. A green politician made that public, and she was subsequently shouted down. Only found a german source, sorry: http://www.silicon.de/41595329/ob-kandidatin-kritisiert-limu...

Personally, I would never use OpenOffice or even Linux Desktop. They would have to pry my MacBook Pro from my cold, dead hands - and yes, MS Office on OSX is actually not that bad. At least not as bad as OpenOffice.