Yeah, I'll second the "Certainly Not a quality product" statement.
I brought a boomerang controller off ebay. The first thing I noticed was how incredibly short the cable was. A closer inspection reveals them to be kinda tacky. In the absence of anything else maybe, but I'm already looking at alternatives. I'm currently fiddling with the APPE hack off Aminet, for converting a PS2 controller to Amiga (CD32 compatible). Sadly I haven't got it to work as yet. :-(
Anybody made the Hack?