Personally I am neglecting buying CIVV because of STEAM.
I am uneducated with it and therefore am doing some research.
I presently play all games offline on a different computer.(Yes some people still do play offline). Where I am located there is no high-speed internet access available so I am on dial-up.(Not in Antartica, just a small country town in Quebec)
So I am questionable if I will have any problems registering and playing offline.(especially on a different computer).