The ability to make campaigns in multiple languages at once with ease! I love that it's easy for anyone who knows how to use Excel or Google Sheets can easily create their own content templates which saves time as well.
It would be great if you could have more than one user per account but otherwise all of my experience has been positive so far (and we're still using only trial accounts). We are creating social videos about travel destinations around Europe. This tool helps us save tons of hours every week when editing video clips into stories.