If she wants to do serious WP or PPTing or Exceling, there is only one option: WINDOWS. I am fan of Android for all it's great apps which you just can't get on Windows, but while basic typing and saving in DOCX is doable (I do it with a Bluetooth keyboard and mouse using Documents To Go), I agree with the others: get a Surface or a small laptop with Windows. Pity the Surface is so expensive. There are other screen-removable Windows tablet hybrids.
As for Office on the ipad, it was actually a clever move by MS. The product was so bad (when I looked at Office 365 on ipad last year) there is no way in #$%^ you'd actually try to be productive with it!
Quickest way to push somebody towards a Surface/other Windows tablet I know. Good move Bill (or whoever took over).
