I recently picked up a used 580EX II here on POTN. It came with a StoFen diffuser. I played with it. I don't like it. Perhaps that is because I don't know how to use it. I tried it direct. All it does is cut my output by about 2-2/3 stops. I tried it vertical, bouncing off the ceiling. Pretty much the same conclusion. I just watched a video on it and it said (and demonstrated) to use it facing forward and angled up at 45 degrees. I guess I could see that if you have no ceiling or walls nearby. I believe that I get better results with a bare flash bouncing off nearby walls or ceilings. Am I doing something wrong?
Oh, I also got a 2' O/C cord. I don't see ever using a flash bracket. Is there any other use for it?