I eagerly anticipated this game when it came out and was bitterly dissapointed due to some unsavory bugs. After 5 patches, like all paradox games its fairly solid. I think a new expansion is coming for this game as well.

The entire marriage system and family tree is what hooked me initially, there really hasnt been anything like this in other medieval games IMHO, as it is probably closer to the mark of how feudilism actually worked.