I run 2 bookcrossing zones and each book needs a bookplate with it's indiviual number. These make it easy to print out 100 prenumbered bookplates at a time!
I use the product to place addresses on fliers or on envlopes when mailing. The product is good much cheaper then the Avery products but does not work with the indicted Avery template. One just has to make a slight adjustment.