It's potentially bad for your shoulder more so than your wrists -- serious time attack requires a lot of arm behind it. I am also not suffering from serious wrist problems. My fingers were getting beaten up from playing TGM3 (on a Sanwa JLF, mind) and music games, but I'm not worse for the wear at the moment. Anyway, I don't disagree that a Sanwa stick would be ideal or that RSI is a serious concern to take into consideration. But c'mon man, get your facts straight.