The Costco American express is an excellent card for individuals who like to use their credit cards to build their credit and pay the balance off at the end of the month. It offers cash back rewards not only on purchases made at Costco but on dining, travel, and other shopping expenditures. This shopper notes that American Express is beginning to be accepted at more and more retail establishments than in the past and its cash back bonus is higher than other cards that offer cash back (such as Discover). My only complaint is that it does not offer and special interest rate for individuals with...