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. / P$ n U# M2 F( `. s $ B" r3 V- K8 ~% `) c% |. vbut 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.