Well, if you run 2 WoW's on 1 computer, the frame rate will suffer, and you'd have to turn down the resolution too. I resized the windows to have them both fit on screen. Tried it out on my 2nd computer, just to see how well it would work for maybe some eventual 3 boxing. It did ok, worked as advertised, took a little while to troubleshoot the nuances.

For 2 boxing on 2 computers, it works fine. Running more than one WoW on a computer, along with more than one Voice Commander to control each WoW, now that's takes a bit to set up properly.