I been using OOo since 2003.
But, I work in the publishing field, and the only problem is that NOBODY else uses it.
I have edited thousands of chapters and manuscripts. I've received chapters in formats ranging from MS Word, to LaTeX, to PDF, to ASCII, to Lotus Word Pro (no, I'm not kidding). I've even received hardcopy chapters that somebody hammered out on an IBM Selectric II. But I have NEVER received an OpenOffice file, and that's unfortunate.