AndyB was kind enough to make an importer so that I could migrate from XenCentral Feedback System (XCFS) to Trader without losing old feedback. Trader is terrific and is exactly what I was hoping for. Compared with XCFS, Trader is more lightweight and intuitive. Trader is also far less expensive, especially if you use other paid addons from AndyB since he charges one low yearly price to use all of his addons.