I love that you can customize everything about your card, from font to paper type! It's also fun because it makes me feel like my business is more personal than just sending out an email or text message in regards of our products/services we offer at work (we are healthcare).
The only thing i dislike sometimes when using hand write for marketing purposes would be if there isn't enough time before someone receives their package so they don’t have ample opportunity look through all options available within each category - this doesn; t happen often but does occur occasionally- however once people receive them then most seem happy overall!!