I love that you can update your design with new colors, fonts, etc without having to go back through the process of designing it all over again! There are some things I wish were easier to use but overall it is easy enough for anyone to figure out how to make something pretty simple look great.
The amount of options available makes creating different kinds of cards super fun! We're able create unique layouts from our email templates so we don't have as many re-usable templates like other companies offer. It helps us keep track of what changes we've made so when the client comes back they know exactly where their card was before vs now. This also allows us to see if there's anything else we need to change or add/remove.