Users appreciate the "annasta Woocommerce Product Filters" plugin for its extensive functionality, ease of use, and exceptional customer support. It comes with many customization options, even in the free version, making it preferable over other similar plugins. The filtering feature, including Ajax and hierarchical categories, enhances site performance and ensures a responsive design. Users highlight the intuitive interface and the fact that it integrates well with themes like Divi, potentially improving user experience on Woocommerce sites. However, some drawbacks include the occasional need for additional plugins, initial setup complexities, and a few functional glitches which are usually resolved quickly by the dedicated support team.