I use it to interface with the controls.dat file. When you "Tab" in the game you get more options and menus. On games with controls.dat information you can see the controls for each player. It also has history, story and some other stuff I think. I couldn't get johnny 5 to work when I tried it so I settled on this. I still think I'll give johnny5 or cpviewer a try on my cabinet, but for now I use plus.