I felt i needed to add a review after reading some really negative ones. I have been using creative players, zen first then vison M and now a stone for a while now. The creative zen is awesome - i've had mine well over two years and to be honest don't know how it still works, it has been abused - dropped (actually some chunks missing!) soaked, nothing short of emersed in water, been through a couple of marathons (which i believe creative don't recommend!) downhill biking/crashing and still it works. Crashes occasionally, just need to reset, choose whether to use mediasource or WMP. For me the video playback sold it - AVI, mpeg, divx (think)plays virtually all things and get the tv out cable and you're laughing (ipod doesn't come close). Only downside is that software can be little buggy and never got the converter to work (only ever had a couple of videos which wouldn't work though)
Bottom line - tough, reliable, great video playback options, good sound, built in radio(?) reliabilty, as with all the creative devices i've owned. To the other poor reviews, if mine broke today i'd happily pay less than £100 for a new one - if you're worried about it breaking after warranty get insurance if not lump it, that's the risk you take. At this price its a steal.