Well - it arrvied this morning. It is ridiculously small, thinking i'll probably loose it before i break it.
Buttons are tiny - but are easy to use (i have average size hands).
Sound quality is great - though immediately improved by putting in some decent headphones. Tried it with the ones supplied and overall quality was average. Plugged in my Shure headphones and WOW what a difference.
USB transfers aren't as fast as you'd expect. A little disappointed even connecting directly to a USB 2 port. Though still fast enough.
It's got a radio and a mic which might come in handy.
Screen is bright and clear, though as small as it can be.
My main concern is that it only charges via USB. So if you're planning on travelling or going on holiday - you'll need a laptop or PC at the other end when it runs out of juice.
Also the necklace that you'd (might) use to wear it is integrated with the supplied headphones and can be detached. So if you change headphones, you'll have no way of attaching it to your person, other than in a pocket.
I'm sure i'll find something suitable to thread through the loop, so that i can wear it whilst running.
Hope it helps. Also silver is quite nice - kinda brushed alluminium effect (not shiny)