Bjorn3D has posted a review on the X-Arcade Trackball Arcade Mouse

Last summer, I had the pleasure of reviewing the X-Arcade Two-Player Joystick, considered the top arcade joystick on the market by many. This time, I get to play more games and take a break from benchmarking to test the X-Arcade Trackball Mouse, the latest offering in XGAMING's high quality arcade peripheral arsenal.

A trackball uses the same buttons that you're used to on an arcade machine, but instead of a joystick, you use a large ball for movement. The ball resembles a cue ball, and you simply use your hand to move the ball around, which then controls your movement in a game. You may have seen a trackball used for some classic 1980s arcade games or perhaps for golf, pool or bowling games.

X-Arcade Trackball Arcade Mouse Review