I've tried them in Apple Stores and they are super. Latest PCA mag reviews this click here and says it's a better screen, supports more video formats, better battery, plus has FM and the ability to record from it, tho might be a tad dearer than the iPod.
A friend has just imported one in black (I think they're only just appearing in the UK) and I have to say it's superb. For me the killer difference is that you can just drag and drop. Creative don't supply content, unlike Apple & Sony, so don't force you to use their import software to protect their content rights.