A zune does has many ma`alos over an i pod. 1. It is easier to transfer music and videos 2. it does not limit you to one computer. 3. the program you use does not destroy your computer as opposed to itunes 4. you can sync wirelessly 5 you can take things off your zune and not just put it on.
but one big maaleh an ipod has is that everything is made ipod compatible. if you do not like itunes there are many alternate programs. many cd players connect directly with it.
The zune just never made it. it is not popular .
but if you like music [or rachmana litzlon videos] zunes work just fine and are cheaper
also if somebody else in the world actually has a zune besides you , you can beam music one to another [although you should ask a shaaleh before you do this as of geneivah but that is another thread].