The OP asked why the course ranks so highly. Many of the responses have nothing to do with golf course architecture. I haven't played any of these other courses, so can't compare based on experience, but in terms of ranking, the authors of Confidential Guide uniformly score KB a cut above Elie and Gullane #1, and substantially above Crail, Leven, Lundin, Panmure, Dunbar, Kilspindie and Longnidry. Are they wrong? I understand why many would choose to play any or all of these courses before KB. As I said, I likely would have done the same if it were up to me. My understanding is dim and limited, but all I'm saying is that it does not puzzle me why CG and others rate KB as they do.