Because of the cleaner aerodynamics it holds momentum better, its between the Nano and Sprint on size, but flies with a P-60, which the Sprint would struggle with. It flies more like a Sprint than a Nano, Ali who did most of the Boomerang testing says its a step up on all of them. Its also a much better package than the Boomers, undercarriage designed to fit and proper instructions. There are three Xcalibur's in the Aberdeen club, you should be able to see one soon.
Dave