Users appreciate the Mailjet Wordpress plugin for its lightweight design, easy implementation, and effective email management features, including good support for double opt-in and basic integration with Mailjet services. Some users reported successfully using the plugin to manage mailing lists, send newsletters, and avoid spam issues. However, many users experience significant drawbacks, such as bugs, slow performance due to frequent API calls, poor customizability, lack of shortcode support, and problematic configuration resets. Additionally, there are consistent complaints about insufficient support response, latency issues, unintended subscription behavior, and compatibility problems with other plugins. The approval process for using the plugin is cumbersome and time-consuming, reducing its usability.