The card is fantasic as far as prices, looks, and technology goes. Doesn't cost anything to own and everyone always comments on how cool the card is because it's clear.

The smart-chip is great for quick purchases (no signature needed!), though I wish more places supported it (right now, seems to be mostly drug stores).

The AMEX point system is smart, though you don't get as much back as with other cards, unless it's specialized, like this one.