I recently installed this plugin and the functionality is FANTASTIC, save one issue. When someone closes the box using the X, on the next page load it comes back. This happens if you hit refresh on an existing page or navigate to a new page. I have the cookie setting at 30 days. It MAY have a bearing on things that I am running W3 Total Cache and Varnish Caching on my server...and it may not. With another plugin I used before this one (scroll triggered box by dreamgrow), the cookie feature worked correctly. I switched because your layout is easier, and the popup works well across numerous screen sizes.