To those who read the review below, you are not supposed to use these for Arcade Fighting Sticks and the like, Stop being a cheapskate a buy a PS3 one.
These are only designed for you to be able to use the Dualshock 1 and 2 as well as simple PSX/PS2 game specific controllers (Dance mats for example) These are mainly for people who don't want to cough up $100 for a SIXAXIS or Dualshock 3.
So, a word of advice to all like the person below, take into consideration what the hardware is actually designed for.
Anyway, a good piece of hardware if you're using it for its intended purpose