Well, with business cards, quality doesn't matter that much because they're so small. i think customers will only care that the text is readable and the picture isn't atrocious. Vistaprint currently has a 250 for $10 deal, so if they're really bad, it won't be much of a loss. I think you should go ahead and order them.
I haven't ordered anything from vistaprint, so I can't say anything about their reliability, but if you order soon, you should have time before fanime to work out any issues.