btw, I have 2 and had them in a control panel. I had some problems with the frontend so I had to use a keyboard... but in mame they where great.
But that being said, I hardly ever use them (haven't even moved them to my new arcade machine). Why? The games that work well with them work even better with the lcd top guns. Sure the joysticks are more accurate, but the top guns are so much fun to play with.