[quote name='jimfoley16']Well, the triggers are un-customizable, and they're preset for the bottom middle and bottom right space, so no matter what you're buttons are pretty much gonna suck. So no, I woudln't say it's good for 3s.[/quote]
In terms of SFAC, the triggers = the black and white buttons, so with a little fiddling around, you can indeed get the standard six button setup configured with the Hori DOA4 stick.
The main problem with the DOA4 stick is its mindless default button layout, which looks like:
B X Y
A LT RT
When you compare that to the standard 360 controller layout, you can easily see the issue. For any game that doesn't allow you to totally customise your button config, it's painfully awkward to adjust to.
I got one the other week for playing SFAC and XBL Arcade games, so it's definitely the goods for most fighting games, but sadly, kinda useless otherwise.