Rich:
I played the Castle last summer with a client, a Scottish course manager and Paul Lawrie (sorry for the namedrop). Paul got a comp (obviously), but the rest of us had to stump up the full whack, including the course manager, who was livid, for as you might know there is 'always' a comp for course managers in the UK.
I have to say I really quite enjoyed the course. The adventurous nature of the design really appealed to me and having been one of the architects in the final selection competition, I could admire what David and Paul have done with a very bleak piece of land. It was certainly an adventure, though the proliferation of hillocks in the line of the tee shots did, after a while, become a frustration. Because you could rarely see the ball come to rest from the tee, it left you feeling distinctly uneasy as to its fate. Clearly, that is something that would moderate with repeated play, which is OK for the locals, but it took away a degree of the fun of a good shot. Nothing wrong with an occasional blind end to a tee shot, but arguably overcooked.
The clubhouse is distinctly odd looking, but looks better from the ground. There was such bitter criticism of the 'monstrosity' of the St. Andrews Bay Hotel that the design of this building is clearly a reaction. However, it is neatly hidden from the town by the sewage plant!
I'd enjoy another shot at it, but not at £120. Mind you, that would go for most places.