I use Open Office. Only the other day did someone request a document in
Word format. Open Office can export in 3 different Word formats but I
send PDF's to everyone else.
Word is a hack and verified as such by former Microsoft employees I know
and even in one book by a former Microsoft employee. It is a "bottom
up" design where their engineers would create a function then give it to
the project manager and tell them to add it. For contrast Excel was
actually designed.
Because Windows is like building an airliner by adding things to an old
biplane I avoid wherever I can even though I have a Windows 7 64-bit 4
core machine for video editing and graphics. My main machine that I'm
typing this on is Linux.