I got it. (Can't help but buy the Civ games.) I haven't logged in that many hours, yet. I don't really like the art style, but the gameplay is good. The three big changes in my mind are: (1) specialized districts which take up on of the hexes near the city (like industrial, campus, holy site, or even wonders) (2) the tech tree is split up between technologies and social/political/cultural paths, and (3) happiness has been removed and replaced with "Amenities,"--cities no longer can become unhappy (significantly affecting all aspects of cities) rather Amenities seems to cap a cities growth. I haven't really gotten to far into combat or diplomacy yet...