iWork
i do a uni course where everyone uses Windows and Office and have to download files and presentations for my course on a daily basis and i have no problems whatsoever
even if there are compatibility "issues" they are handed to me in a nice warning box and give me options to solve them
e.g. if a font is missing, [and its
always Wingdings
] then it lets you choose a new font instead
p.s. i have a copy of Office that i could install if i want to but i ain't
