QF CSV Shipping Rates

The reviews for this Shopify app are overwhelmingly negative, with multiple users reporting that the app does not work as intended. Customers have expressed frustration over the app's failure to update shipping rates, inability to upload files, and lack of responsiveness from customer support. Issues with functionality and slow support response times have led to dissatisfaction and disappointment among users. However, there is one positive review praising the app for its ease of use in setting detailed shipping rates and highlighting the developer's responsiveness.