Thanks for the sneak peek, Humbug.
I decided to buy it last night. I think I'll recommend it after about 3-4 hours playing.
Yeah, it is nice and relaxing (takes a long time, need to speed up all the time). No enemies, no zombies, no fighting, only the world and human doing interaction. The game is a matter of choice, since you got resources to manage, one wrong turn, pay the consequence later (e.g. wrong distribution of resource). There is also natural factor as well, which can drastically alter the game. I like this game, they stress more on the mechanics rather than graphics/sounds/effects (things that most AAA titles stressed too heavily). There is a neat tutorial play through as well. So this is a quite a good deal for $20.