i had a kindle 3 for a week before it "leaked" and they declined me a replacement
no worries, im back to my jetBook though so its allll gooooddddd
but the ghosting was an effect i found strange.
its like a weird smell in a room, even though you might get used to it over time, its still there and can become more annoying as time goes on.
i think thats the main issue for avid readers, where you want a clean page, but you can still see the text from the previous one - not my cup of tea.