I picked this up a while back, maybe during the last Summer sale. I never really spent enough time with it to get a good grasp with it until now, and I'm absolutely loving it. I spent 20 hours playing it this weekend. It's pretty daunting to start given the variety of different modes, and the tutorials aren't great about giving you a lot of information, but fortunately it's a ton of fun figuring stuff out, and even in failure you can still manage to make some impressive cities. And when it does finally click and you've got multiple islands settled with trade routes and production working as intended it's a great feeling.
I was feeling pretty bummed about the new SimCity, but after getting a good hand of 2070, even if Maxis managed to fix all my issues with SimCity (offline play, huge cities, working traffic/services/AI) at this point I'd have zero desire to play it over this. Everything about it seems utterly primitive.
I just wish the DRM on Anno wasn't so disgusting so I could feel better about recommending it to others. I'm going to check out 1404/Dawn of Discovery next.