Don't trust the preview.First off, for the most part, the card is beautiful and I highly recommend it. Just be careful to stick within the characters per line guidelines in the instructions, no matter what the preview looks like.
I tried to squeeze as much into each line as I could based on the preview, because I couldn't think of a shorter way to make my poem sound right without saying less than I wanted to say, and by removing spaces and things I managed to make one line of a few too many characters fit on the preview. On the actual card those letters were pushed to the next line. It's not a disaster, but it did cost my rating one star ;)