Users express a strong appreciation for the WordPress plugin's image management capabilities, especially for optimizing, managing sizes, and creating retina images, which enhance website visuals. They find it simple to use, efficient, and beneficial for updating images in the Media Library. Users also commend its reliability, support by the developer, and positive impact on site performance and user experience. However, some users mention drawbacks, including issues with causing website outages, server crashes when handling many images, and specific problems with retina image rendering on certain themes. The plugin can be resource-intensive and sometimes doesn't work as intended out of the box, leading to frustration and additional manual fixes.