Fine on PC (Not on PS3)
Though it uses the USB interface, the Super Joy Box 3 Pro does NOT work correctly with the PS3, specifically with SplitFish's EdgeFX controller. (Only a couple of buttons work, no mouse, no analog.) On the PC, drivers don't seem to install correctly when checking Device Manager. There's also hanging and minor difficulties configuring with Vista's Game Controller properties. Eventually - with patience and configuration tweaks - controllers seem to work well enough. (Vista SP1 32-bit.)

Better than nothing
I bought this thing and I received it yesterday (***** for the service, great!)
I could set it to play PES 2008. It worked good. I'm very satisfied.
The problem is I couldn't play gears of war.
Too bad.

Perfect!
Works wonderfully with Stepmania and the driver installation in Vista was perfect. I had no lag and no problems setting up the buttons. The package comes with a floppy disk for the driver installation but if you have a floppy drive and you want to put it on a laptop, it's as easy as copying your setup file to a flash drive and going from there. I would highly recommend this product!

Tested with Beatmania Controller
I tested the converter with a Beatmania controller, and it works really well. The response time is really fast, and you can press all the buttons on the controller (including the scratch) at once. The wire is very short also, meaning no extra wire to get wrapped up in.

VISTA WORKING DRIVER
WOW they have windows vista driver on their site now.

coool