In a previous life, I used 1.1 for production use. I now work at a MS shop, so it's not really feasable. The word processor is MUCH better if for no other reason it handles graphics and formatting much more intelligently. The spreadsheet is not quite as good as Excel (but let's be honest, Excel is MS's finest product period)...it doesn't integrate with other things quite as well. It's perfectly fine, just not as easy to connect to other programs and files. The presenter--I liked the interface better but never had a chance to use it in front of customers.
My only REAL complaint about open office.org is it's lack of an easy-to-use database product. If we didn't have such an MS fetish here, I'd be telling anyone who will listen to use it. You can't beat the price, and it's at least MS Office's equal.
On either a Win2k, a win XP or a Debian GNU/Linux box, I don't think the openoffice.org EVER crashed or had issues.