It's very simple but powerful at once!The interface has some issues with mobile devices as well if you are planning big campaigns like this one we did in April 2019 where there were over 35000 registrations (event was fully booked). Easy setup of event page layouts & custom CSS classes which allowed us to make changes without having developer time available to do so. Also helped when I had forgotten my password during registration process - just go back few minutes earlier than what your account creation date would have been and try again!