Wouldnt bother. They have about 3 designs to choose from and they have there company advertised all over the cards front and back.
I had my cards printed by these guys, used my own design, no mention of Vistaprint anywhere on the card and it cost me £4.00 for 250 cards and I got a free silver effect card case. I have no complaints.
Sorry if this is classed as advertising, I have no affiliation with vistaprint whatsoever.