From a cursory glance, I don't like this design at all. It's too complicated. It's too big. It's too expensive. Is it waterproof? Why does it require a smartphone to use? Why does it need USB and bluetooth? Why does it need 2 gigs of memory and a battery? What's the advantage? Is this thing a Bitcoin payment card or a child tracking device? Jesus, choose one.
i actually like the fact it needs both the card AND the smartphone, there's no way a thief can steal both at the same time, and there's no risk of getting skimmed when you lose it.
in order for bitcoin to gain mass adoption as a currency, and not just as an investment, we should all support efforts like this.
bitcoin is currently much too complicated for the average shopper, NFC cards are much easier, and bitcoin and NFC can work very well together.