Haven't really seen the cursor shakiness you describe at all. I've got my tablet mapped to span both displays (a 1080p led, and a 20" crt @ 1400x1050), and it acts like a super fast and very precise mouse. I seem to not use it very often at all these days though. My stylus has a busted switch (or more accurately a lost switch after I dropped it on the kitchen tile floor and it skittered off to parts unknown) for doing fancy keyboard combo stuffs. It still works fine as a *mouse replacement* though but I find it easier to mouse with my right hand and type with my left, so less disruptive that way.
EDITED: 26 Oct 2016 16:10 by DSMITHHFX