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. ; U' Q- L5 B' g2 Q$ S4 W7 U+ r& M! S2 A" C% T; m, ]
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.