Users appreciate the Duplicator plugin for its ease of use and reliability in migrating WordPress sites, making backups, and site transfers. It simplifies potentially complex tasks like site migration, saving users significant time and headaches compared to manual methods. The plugin is praised for its user-friendly interface, clear instructions, and robust performance over the years. However, users experience some drawbacks, such as issues with handling large files, MySQL connections, and intrusive advertisements in the free version. Some also faced challenges with older backups and have noted problems with importing unless they pay for the Pro version. Despite these cons, overall feedback is highly positive.