I have used the Duo for work purposes (I'm a teacher/campus minister at a PK3-8th grade Catholic school) since January. As the previous poster noted, writing on this does not work at all. However, the small form factor of the Duo means that I can use OneNote (or Evernote, which I favor simply because I can see all my notes on my Android phone) to take notes practically anywhere. Staff meeting? Parent Conference? Bright idea during a class? All of them quickly typed in
It also means that I can duck into an empty classroom and get some work done on the Duo instead of walking back to my office inbetween classes (gotta love wifi!)
I made my seating charts in MS Publisher and keep track of attendance and behavior in tablet mode (using the on screen keyboard for short notes is fast).
So . . . bad for handwriting, but excellent for my purposes.
Hope that helps you make a decision.