Anybody try any controller adaptors

Has anybody tried any universal controller adaptors. Ive seen only a handful of mixed reviews for non brand name ones (im guessing cheap chinese knockoffs?). I was thinking of picking up one of these.
I definatly prefer the ps2 controllers design to gamecube controller (for my wii) and my pc controllers and i would also be using it for dance pads and in the future an arcade stick.

yes, we do