Unfortunately, Moo's printing process cropped a few of the cards incorrectly; one card (of which there are 4 or 5 in the box) has a block of solid black at one end of the image. Another was cropped slightly higher up than I intended it to be.
I contacted Moo about this and, within an hour or two, they had replied to me, sending me a voucher code for a free box of 100 MiniCards. Now that's what I call customer service. :-)