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. 1 U* y+ X; L9 ^9 D- v$ c2 ^3 y/ d7 K' Z# X( t/ a6 i: ]
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.