What really makes this game for me is the simultaneous action selection. It is a great way to reduce downtime and it introduces an element of uncertainty that is determined by your opponents instead of being random.
I've heard this described as 'Risk on steroids.' Catchy, but it just doesn't do justice to this fantastic game where resource management, building and combat all must be juggled each turn. There are some brilliant mecahnics at work here, including the combat resolution system. Don't let the German language scare you off, secure a copy and download the necessary translations, there aren't that many, from the Geek. You will not be disappointed.
Finally picked up a copy after much searching. Although completely in german, this is a very worthy addition to any serious gamers collection. All of the good stuff that has beeen written about it is true. Excellent game!