Decent but not stellar
It does a pretty decent job at most tasks, and I feel that most users would be quite happy with it if their ecosystem was built entirely around it. Unfortunately, the importers from MS formats usually require manual editing to fix various formatting issues that are not converted properly. Additionally, the current version has a bad Info.plist that causes LibreOffice to claim ownership of many file types that it should be an alternate for (eg: MS Formats, Plain Text, etc). This causes such formats to be opened in LibreOffice even though antother editor would be more appropriate as owner.
The UI does a decent enough job at trying to fit into OS X, but it still doesnt feel native.
jerhuddle about
LibreOffice Vanilla