Users appreciate the WordPress Carousel Slider for its user-friendly interface, versatility, and excellent customer support. It helps them create polished and customizable carousels, enhancing the visual appeal of their websites. The plugin's simplicity and configurability are praised, along with its minimal performance impact on websites. Users also value the support team's quick and effective responses to queries and customization needs. However, many users feel that the free version is too limited, with essential features like the lightbox available only in the paid version. Some reported issues with custom image alignment and difficulties when first integrating the plugin.