Overall I found the game interesting and fun. Unfortunatelly once your settlement reaches a high enough population (in my case this was around 1500-1600 settlers) the game becomes unplayable due to massive FPS drops and "pauses" every 10-20 seconds. It doesn't matter which graphics settings, since it seems the game uses only one CPU core for all animation calculations, and there's a lot going on n a settlement of that size.