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$ Z3 [" W6 P; B( F" s * E' d- \. L* K e% a9 g* t1 `5 H/ M obut 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.