I like that it allows me to have multiple email addresses tied into one account, which is really nice for when people want different types of emails sent out (such as newsletters). It's also great because you can add more users at once without having to create an entirely new user profile or subscription. They could do some work in getting rid of their 'one-click' button in order to make things easier with adding/editing subscriptions - however this has been improved since our first experience using them! Adding many accounts makes managing all my communications much simpler than before.