Merchants generally find the "Thankly Thank You Page Tool" to be a user-friendly solution for customizing Shopify's Thank You pages, with many appreciating its simplicity and effectiveness. However, there are concerns about integration with Shopify's newer checkout systems, as well as some technical issues that can hinder performance.
Overall, the "Thankly Thank You Page Tool" app is a potential asset for Shopify merchants looking to personalize their checkout experience without upgrading their plans. While generally praised for its ease of use and effectiveness, improvements are needed in technical integration and customer support responsiveness to enhance user satisfaction further.