Sean,
I'm curious, without mentioning details, when is the last time you got a recommendation from someone on this site and as you walked off 18 you thought to yourself "He's lost his bloody marbles"
P.S. I don't think even the most objective, rational, logical thinkers would ever agree on a definition of great in this context, but it seems there are a lot of terrific opinions and assessments of courses from people on this site. To boot a few years back we took a poll of everyone's top 100 courses over the course of several months....and IIRC correctly, it was very similar to the ones listed in the prominent periodicals.