Users appreciate the GiftUp! WordPress plugin for its ease of setup, seamless integration with websites, and user-friendly interface. It enables quick customization and functionality without the need for coding, offering features such as easy gift card management, integration with various payment processors, and an intuitive dashboard. Users also value its lack of monthly fees and flexibility to charge transaction fees only when a gift card is sold. However, a drawback mentioned is the additional charge required to remove the GiftUp! logo from the checkout and emails, which some users feel is excessive given the transaction fees already in place.