The fill assistant only shows a card type and the last 4 digits e.g. Visa (1234). This is not much use when you have quite a few cards. Even when you select one it still doesn't show the 'title' you gave it - how do know which card to use?
Instead it should show the title you gave it e.g. My main Visa card.
Also there is no way store or display the CVC. (I put it in comments, but this down't appear in Fill assistant)
PS - this should be in IDEAS, but I don't seem to be able to create one??