I use this with my Hammond SK2 to give me control of both manuals simultaneously. The set up was very easy and I like that it can be customized to the Nord Stage 2 and the Korg Kronos (it can send sysex commands). It's built like a tank and the built-in battery will apparently last two years because of the low amount of power the unit requires, it will also run without the battery off most midi outputs. The benefit to using the battery is you to only have to plug-in one midi cable when you're setting up for your gig. I'm sure many other uses for this very customizable gadget.