It's a no-fee 2% cash back card. There aren't that many of them out there. This makes sense even if only as a secondary card. It gives me a better rate of return than my fee based Southwest and Chase cards, and adds Mastercard to my currently Visa only wallet, so I'm open to it.
What always blows my mind is why Americans use credit card. Its much easier to use debit. Why would you ever want to pay banks fees?