I have used Octopus since shortly after it was created. I like it a lot, and it works pretty well. My biggest problem has been simultaneous key-presses with key modifiers causing strange behavior. For example, if I broadcast shift-z and am hitting '2' at the same time, then sometimes this ends up as shift-2. I don't know how the key-broadcasting works, but I would have expected that the ASCII value actually gets sent as opposed to the individual keys, which may not have caused this problem.

I like Octopus enough that I'd have paid for it. Unfortunately it takes so much work to integrate that kind of program that you don't know for a long time whether it will work for you or not.

FYI: I use Octopus, hotkeynet, Autohotkey, xkeys, and a logitech g15 for my multi-boxing.