It depends on the speed of your server, but usually it won't take more than a minute or two. In most cases it will only take a few seconds. Once the plug-in has been installed, it will upgrade automatically when you revisit the site.
Card stock is generally too heavy to run through most home printers.
Simply highlight the card's existing message and begin typing. Your keystrokes will change the card's verse right on your screen. You can also change the size, color, and type of font used on your card, as well as the text alignment. You can print as many copies as you like. This feature can be especially helpful when you're printing invitations or announcements.