I will not write a complete review, there are enough of those here. I will not rant, either. I have played the game and I like it; the complexity, micro-managing and pace are fine by me (except you either get declared war on by everybody immediately or nothing happens at all).
HOWEVER, I cannot, in good conscience, recommend this game for a very simple reason: It's incomplete, and thus borders on a SCAM; at the very least, it reflects poorly on BattleGoat's business ethics.
This game (main game and addon) was supposed to receive additional attention after release, adding several more features (including a fallout/radioactivity and an environmental impact system). About halfway through, BattleGoat abandoned the game, leaving the game with a stupid AI, pretty damn buggy and, worst of all, content incomplete (which shows - there are buildings, designs, research that are completely pointless because the corresponding parts of the game were never implemented).
I therefore recommend that you avoid this game (and other games from BattleGoat) at all cost. This game is basically a polished Alpha and if the devs couldn't be bothered to finish this game, even after people already bought it, they are not worth your attention. Business practices like that should not be condoned or supported, so think twice before you buy from them - There may very well be a better, finished game out there.