Hi! I did some testing and here is some feedback.
Display setup on HKN2 software. And here is what it looks like on real-life. Setup was "too easy" after Synergy. Actually I was looking for somekind of setup window for connections... and then I noticed that clientbox was already connected. Then just open displaysetup and move screens the way you want them. Mouse goes nicely from "downstairs" to "upstairs". Works fine so far :thumbup: