I started playing it about a week ago, and so far, I have lost many hours of sleep to it.
It can be something of a long game depending on the map that you are on which can range from a single star system, to multiples of star systems. Largest I've done is 5 stars, roughly 50 planets, took me about 9 hours to finish the map.
I think the game's pretty well worth taking a look at.