Users generally appreciate the Hustle plugin for its versatile pop-up, form creation, and lead generation functionalities, which they find easy to use and highly customizable. Positive comments highlight its smooth integrations with platforms like Mailchimp, Mad Mimi, and Kajabi, effective customization options, useful documentation, and the beneficial "exit-intent" feature available for free. However, some users encountered issues like compatibility problems with newer WordPress versions, functionality gaps, such as lacking notification emails and custom field support, integration failures with specific services like Constant Contact, complex setup processes, and persistent prompts for reviews. Some also cited concerns about security vulnerabilities. Overall, Hustle is valued for its completeness, but it could benefit from improved integrations and additional functionality.