Personally, I like it's features (though it's design may be questionable).
*You're always one click away from ANY menu from ANYPLACE. (A big plus that I am suprised Apple hasn't included yet.)
*Magnetic headphones to keep them from getting tangled.
*The ability for artists I like to give their entire albums (or part of) for three full days to listen and decide if I want to buy - instead of sitting at AOL Full CD Listening Party
or my favorite music blog all day.
*Nice sized screen with fullscreen album art - instead of the tiled iPod ones.
*The thought that they decided NOT to copy Apple's clickwheel (and most people who reviewd it, like it). I'll have to check this one out, though, since I am all about the wheel!
*The ability to buy songs loaned to you WITHOUT opening up the Music Store. You just click a button in the jukebox and it downloads it for you.
I dunno.... you have to say that MS has done some really good things with this one. (Again... the design is questionable.) Will Apple follow? And will we call them out on it when they do?
(Oh... and they are working on a phone, too.)