everything, interface is awesome, seamless interface with BOTH Mac and PC, everyone loves apple (excpt hardcore PC people) and maybe there not ready to that the apple PC plunge, but an MP3 player thats compatiable with win XP isn't too much of a plunge. The scrool wheel is insane-o, greak battery life on the new generations, and the style, those were all my reasons, and also the fact that, now a days for the amount of storage you get its a decent deal, if your thinkin about an MP3 player, go for an ipod