Users appreciate the WordPress plugin's simplicity and functionality, allowing them to easily add custom CSS to individual pages, posts, or the entire site, thus resolving specific styling issues without the need for extensive coding knowledge. It is particularly helpful for customizing WooCommerce product pages, handling theme changes without losing CSS modifications, and avoiding the necessity of FTP access. The plugin's ease of use makes it a go-to tool for both novice and experienced developers. However, some users noted drawbacks including the absence of a revision history feature, conflicts with other plugins, limited CSS scope management, and occasional issues with certain CSS properties and syntax. Additionally, there's a desire for more advanced features like syntax highlighting and SCSS compatibility.