I wanted to like it but I'm not sure it's really better and could be much worse merely from being so different from every other method.
That said, there are some problems:
* Amex CVV doesn't allow the proper 4 digits
* Tab-order is weird
* Confusing because sometimes you tab to next field, sometimes you don't
* Name usually not needed since already entered elsewhere (inexplicable why so many checkout forms do this)
* Difficult to change card number
That said, there are some problems: * Amex CVV doesn't allow the proper 4 digits * Tab-order is weird * Confusing because sometimes you tab to next field, sometimes you don't * Name usually not needed since already entered elsewhere (inexplicable why so many checkout forms do this) * Difficult to change card number