It's like many great bits of engineering. The elegance, beauty, and functionality comes from simple great design. The Samurai is that and more; it's precision is unmatched, with all parts meeting a tolarance of +/- .0005 of an inch. It has the re-designed SuperYo IntelliGap(tm) adjustment system, and a ceramic SatinGLIDE(tm) bearing for the ultimate in precision. This detail in execution has allowed this yo-yo to break the world's record for the longest sleeper with a clocked time of over 12 minutes (Matt Owen, Oct. 23 1999). And with this sleep time, it still plays.