Users appreciate the WordPress duplicate plugin for its simplicity, effectiveness, and user-friendly interface. It requires no setup and works out of the box, saving users considerable time and effort. The plugin is also praised for its ability to duplicate a wide range of content beyond just posts and pages, making it versatile and comprehensive. Additionally, it is light-weight, fast, and intuitive. However, some users report drawbacks, such as the plugin not duplicating custom fields from ACF (Advanced Custom Fields) and the persistent donation pop-up, which some find intrusive. One user also mentioned difficulty locating the "duplicate" button due to a lack of instructions.