After several battery problems and many crashes, my Ipod died after 1year and 6 days (I could therefore forget the warranty). The headphones are terrible and it's expensive. Also Ipod doesn't read many video formats which forces you to convert your files all the time!
I've had my Zen for almost 2 years, never had any problem at all, the screen is brilliant and the sound is reasonably good. In addition, the Zen has equalizers and it reads XVid, DivX and WMV formats!
The only inconvenients I can think of :
- chunky and heavy
- Sound volume too low if the bitrate of your files is small
- not as many accessories (screen protectors,...) on the market as the Ipod