I purchased this game on the off chance and haven't looked back since.
It's a different kind of RTS as you can determine the best way to run your empire. It's primary focus is economy and infrastructure so for you warmongerers out there - THIS IS NOT THE GAME FOR YOU.
You can go to war, but war is costly and takes time, therefore to win a mission, it's probably best to stick to profiteering unless you really have to defend yourself.
You have to manage your citizen needs, enable trade routes to ensure resources are being transported between your settlements and maintain your thriving capital.
It's annoyingly addictive as there is so much to do and build but at the same time, can get kind of boring.
A must-buy for Civ/Settlers fans.