It's main use is definitely to simulate JCM. It can go beyond the traditional JCM set ups as well because it can use multiple dials and more robust math than addition and subtraction in figuring a parameter's value. Additionally, it's the only way to date to do this from inside of Poser, which lets you get real time feed back and make your changes a lot faster than text editting the cr2. Aside from linking dials together, it can simplify a few tasks in setting up a still scene (getting things to move relative to one another while you're tweaking your composition), but the main applications are for animation or building specialized figures (like a robot who would have moving gears). I hope this helps, if you'd like to see a bit more about how the product works, you can visit http://poseworks.8m.com/support.html and view the help files for PowerDials and Manager online.