Users find the WordPress plugin particularly valuable for its ability to allow theme testing and development without affecting the live site. This plugin provides a straightforward way to switch themes for admin users, making it an indispensable tool for developers and non-tech-savvy users alike. Many appreciated its simplicity in previewing new themes and checking compatibility. However, drawbacks include potential conflicts with widgets and custom settings; some users reported losing their settings and widgets. Additionally, the plugin doesn't support the latest versions of WordPress and doesn't allow a seamless transition of settings, menus, and widgets between themes, which can complicate its use.