I kept seeing Amedei on lists of the world's best chocolates (e.g.). I liked the one that I tried, but if you want one too, act fast! The "Limited Edition" thing means that they only made 20,000 bars. The one I ate is number 13,53P (???). I don't know what that means exactly, but I think there are no more than 19,999 left.
(Aside: as I said before, the handwritten number means that Amedei is officially highfalutin)