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. - C/ r0 I0 Y* d9 u$ I& a2 u4 T9 O$ F2 H8 ?% Z6 P+ @
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.