I received two of the 1GB versions about a week ago. Both of them are working fine, so I can't complain about a thing... yet.
The interface takes some getting used to, but I was expecting it to be much worse than it actually is. They used decent icons and the controls become intuitive after a few days...
The earphones are crap, but i replaced them with a personal set with decent sound quality.
The FM gets a tiny bit of static when you scroll through the menu while listening to it, but goes back to normal decent reception when you're not touching buttons.
I only bought these for the gym and they are serving their purpose very well... so far.