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. : k/ \1 h4 y' t% ~; L; L3 D% x+ y9 v3 q& t# N8 G( C" W
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.