Open Office? Well, yes, uh... Ahahahahah-Ohohohoho-Oohoohoo...sniff, sorry, please stop...
(Just kidding mostly) - we use linux all the time. OO does make my hair hurt occasionally but I find myself using officey-type software less and less anyways these days.
Go ahead and laugh. I have MSOfficeXP at work and even with the compatibility pack installed, it won't open many files I get that have been made on newer versions of MSOffice. Open Office does not have this issue.