[Loren]

Another vote that they did it right: It's based on the license key. Switching a game from my desktop to laptop when I travel is a non-issue. You can patch without having the system on-line. A patch hit while I was overseas with my laptop. I had internet access via an internet cafe machine and turns had to be copied back and forth via flash drive. I simply downloaded the patch to my flash drive and put it on.

So long as you have a legit key and don't try to use it from two machines in the same game at the same time you'll never see the DRM at all. (Switching machines between turns is ok.)