We did have a few customers install on Harmon Magnum stoves, but no one that I know of has installed on one of the new super mags as far as I know. Chances are it can be installed on it. The wiring used for the older magnum
would probably be a good starting point.
As for it "doing any good", that depends entirely on what you find lacking on the controls you have.
I don't know what changes Harman made to their controls for the super mag, so I can't really give you a bullet point list of differences, unfortunately. If you can give us some idea of what you're not happy with I'll let you know what we do so you can make a decision.
Also, we do have a 90 day money back guarantee if you aren't satisfied with the Coal-trol, so you could give it a try and decide if you want to go back to your old controls or not.