Be aware that they may charge a transfer fee equal to a certain percent on the amount. I think ours was about $260.
I have also used the no interest credit to buy sewing machines and cameras. In one case, I had to use the next day mailing to make sure they got the final payment in time. It did work, as it got there in time. Lots of stress, though. Didn't want the 30% interest charged on the original amount, that is for sure.