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. 8 I' C, P, B6 T5 }8 U4 Y5 W9 y0 s4 {, a
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.