Lots of comments so far about the production speed. I had the same frustration early on with the production speed feeling slow, but I'm starting to warm to it. One of the things that always bothered me in Civ 3 and eve 4 was that later in the game you could often build every building in every city. In Civ 5 you HAVE to make good choices for each of your cities and the game almost forces you to specialize. As for units, yes they produce slow, but with 1 unit per tile, and the fact that most battles do not result in you losing your unit, each one is worth significantly more. Civ 5 encourages you to treat your units as battalions rather than squads, it's just something to get used to.