This case study gives the results a usability study for the discovery tool Encore Synergy, an Innovative Interfaces product, launched at Appalachian State University Belk Library & Information Commons in January 2013. Nine of the thirteen participants in the study rated the discovery tool as more user friendly, according to a SUS (Standard Usability Scale) score, than the library's tabbed search layout, which separated the articles and catalog search. All of the study's participants were in favor of switching the interface to the new "one box" search. Several glitches in the implementation were noted and reported to the vendor. The study results have helped develop Belk library training materials and curricula. The study will also serve as a benchmark for further usability testing of Encore and Appalachian State Library's website. This article will be of interest to libraries using Encore Discovery Service, investigating discovery tools, or performing usability studies of other discovery services.