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 x) ~* ?( S* y) A* E. ^. i; h+ p8 v) X+ G% z6 q, A/ S% q% H4 b: j
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.