Well, I use MS office 2007, although I do have MS office 2010. But, I don't have the time to install it since I really do not use most of the MS programs.
One funny thing though; My new laptop which comes with windows 8 has this offer on it, if I can put the passkey or install Ms office '10 on it, I would be able to unlock a latest version of MS office. However, I couldn't care less.