I installed this last night The Flash export feature is awesome. As far as I know there has previously been no easy way to convert PowerPoint presentations to SWF's. The PDF export also works really well and is extremely fast. The only problem that I have with OpenOffice is that most Microsoft Word docs that I open don't display properly. There is always something that is out of whack. I would hate to create a resume, send it to an employer and have it display all funky in Word when they open it.
Another point worth mentioning is that during setup, the installation doesn't install the Java Runtime Environment for you (although there is an option to do so, but it's greyed out and you can't select it). You have to download it, and then point the installer to it.