The only problem with the 750 years of play is that anyone can do a world conquest in Ck in ~300 years with the help of your friendly neighbourhood mongols.
Anyway, CK is a very good game. Unlike other paradox games, where there usually isn't a set goal, but you simply try to amass VP's without any clear purpose, CK has a very good "goal". Like, "could duchy of flanders make it against mongols if i never claim a king title but just all the duchies and conties of lowlands?"
Also, it's quite remarkable as a paradox game in that it's only Version 1.03b and I think the game is actually complete, stable and gives you a good challenge.
