God this thing is a buggy piece of ****. Every time I plug it into the computer the launcher I bought disappears. Every few times I eject and unplug it, it freezes. The management of files and folders is abysmal, tagging is awful. I am just about ready to sell mine I have to say. My 10 year old iPod destroys the ZX1 in terms of file management and UI.
Mate, I really hope you arent sock-puppeting us and that you do have a genuinely defective unit, I've been using mine for less than 24 hours - had to scour Bangkok to even get one - and thus far I'm extremely happy with the user experience. I'm afraid your post reads like some of the one-star Amazon 'reviews' that seem to have been deliberately placed by competitors against a wall of 4 and 5-star customer reviews. If you do have a defective unit, I'll be interested to hear what your warranty experience is like - until then, I'd suggest that you reconsider statements like the one about your 10-year old iPod before posting again, I have a 3-year old iTouch and the sound quality isnt in the same universe, even if Apple's UI is the benchmark I still hold all other DAPs to. I've also owned expensive Sony DAPs before - particularly expensive given the Australian RRP at the time - and the UI is one area where Sony shines compared to its Chinese competitors.