hey David - i used HKN for 8 months before switching to ISBoxer about 5 months ago ... i switched because I wanted quick window swapping, and a way to lay down a ground-target AOE on my toon (like blizzard) without having to switch to the toon to cast it.

After using keyclone, HKN and ISBoxer, i would give ISBoxer a solid 9.5/10. The only real challenge I have , is that it can be difficult to troubleshoot a mapped key not working properly if you have a lot of them defined. Apart from that, it's great. As far as I know, it's the only software that has true mouse broadcasting - not simply "mouse-click" brodacsting ... It's been invaluable to me to see the cursor (and the grreen-ground-target) move on my toons as I move the mouse on my main.