They are very very nice when they are working..
ITunes even can tell which one is plugged in, so you can sync 2 seperate play lists.
But, even the ones that don't screw the pooch and die are only good for a year or so last I heard due to the batteries not being replaceable by the user or even Apple.. There are hacks available but still..
I 100% recomment 512M+ solid state flash playas with replaceable batts and taking the time to refresh them occasionally with new music.
Completely flooded, after drying out, good to go. Even the music still there.