theoretically it may affect your credit scores; however, in my experience, it does not make a big difference. I've canceled a couple of credit cards, when I apply a mortgage, I still got a good rate.
not bad. 9 G$ r: }3 j, P- x/ j. q4 O7 @% `- t# b$ N9 L
but compared with other rewards cards, the rate of getting points is not good enough. But if you buy things a lot at their stores, it is very good.