Quote Originally Posted by Torrid
I used multiplicity for a very long time but switched to Multibox because as far as I know Multiplicity doesn't do key broadcasting. So you have to have your mouse focused on the individual screens in order to control each toon.

Aside from that, Multiplicity has worked very well for me for about 3 years.
I use Multiplicity with Multibox. Multiplicity allows me to have my 4 other PC's with no keyboard/mouse attached at all (much cleaner desk) and then I just use the key broadcasting from Multibox when I'm ready to play WoW.