The best Business card you can hope for will not hurt your business.  The card itself will not bring you business success but a bad card can hurt you.  Imagine a business card with something offensive in the print.  The best that can be expected from a good business card is that is conveys your contact information in a good way.  The business itself has to be good for the card to be of any use at all.  If you do not have a good business then the card will not help.  Saleh Stevens has a good business and the business card he uses is OK.