The ease of use! It's very easy for me as an amateur web developer with little knowledge about coding or html/css etc.,to come up against something I'm not familiar enough in order make it work properly when my client asks so nicely (or sometimes after paying).
However there are some minor issues here &there which could be improved upon but overall this product has been great from start-up through implementation into production websites we've worked together over many years now - no complaints at all really just wish they did offer more than one slider type option because our clients have different needs too often you end having 2 sliders running side by sides each taking space away where only 1 should go if used correctly anyway however what do i know?