Works in Port No.1 (XBox).
Got one of these for use with the XBox.
Seems to works fine when plugged into port No.1.
A bit iffy when inserted in the other slots (i.e. 2, 3, and 4).

A must need
This is a must need if your use to ps2 dualshock 2 controller! it works fine for my Gamecube and PC, it even supports the rumble! the joysticks sometimes get stuck and move alot during gameplay even though im not touching the controller but i belive i need a new controller because i recently opened mine so i think it must of ruined the joysticks. Thanks Play-Asia for selling such a great product!

THIS!
OMGZER BEST THING EVAR

Don't buy
Does not work. Tried to connect redoctane dance pad on both xbox and pc, same result, no response.

Doesn't Work With Hori Real Arcade Pro
I bought this for my son so he could use the arcade pad he bought but the adapter doesn't register the arcade pad.