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. 5 S+ W! x5 {3 f# @: h 9 g. Y8 c% x* l4 I5 i9 [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.