Kinda sad that posts are separated by a couple of months, but for what it's worth I've never had trouble with the S9, and I didn't transfer my music in 'small amounts.' The problems I read about really sound like user end errors, although that's not saying it's okay. iPods don't require even computer-stupid people to be careful.
I read all sorts of scary posts about the Cowons, but then I also read posts about people jumping into modifying their Cowon right away because they aren't satisfied with the firmware for some reason... I suspect this is where people screw something up, but aren't admitting it.