I have seen a few such as the 3 in 1 majic box and the Dual PS2 controller one, but I am not sure how good these really are. Some reviews seem good, and some seem bad. Does anyone own a USB to PS2 or Gamecube controller converter?

I find many of the PC game pads that best buy sell are not that great and I am thinking since I have all these controllers that are still in very good condition then I might as well use them.