Inspirational, influential, and innovative. Certainly one of the best mapmaking games ever made. Never have I introduced this to a playgroup who was not in wonder and awe at what we had created at the end of its brisk playtime. Thought-provoking and thoughtful, and an incisive commentary on the nature of community organization.
By all means use it to worldbuild for your campaigns, but I implore you also to play it as it is; this game is an art object in its own right!