I had some issues with activating the card. I thought I had succeeded in doing it online only to have the card declined when I tried to use it. Called customer service and was told that it wasn't activated but the rep took care of it while I was on the phone. That was a couple of weeks ago.
Just used my card to buy some miles thanks to their new promo for cardholders (buy 1, get 2 free) and it was approved.