All of these arcade boxes work the same way..
IMHO, it's more fun to diy..
There's not much to it really, it's a wooden box with 10 buttons and a joystick.. wired to a game controller.
The Hit-Box controller is actually the more precise way to play fighting games. But, in the same way, it just swaps the joystick for 4 buttons.. which greatly increases accuracy of inputs..