Playing on stock FB9 is a recipe for frustration, and yet I did so for almost three years before finally picking up one of these, so believe me when I say this restored my will to play Jubeat. You could *maybe* pay slightly less for this by going through a proxy service for overseas storefronts, but yubiparts makes the process about a hundred times easier.
Painless, quick delivery, relatively easy to install, and worked perfectly once I got all the settings correct. Definite must if you're planning to play on a Jubeat con. Eliminates the input lag and the frustration of missing patterns on higher charts from an unregistered button press.