Just got through it and the game is absolutely amazing, although it has some problems like some boring and teeth-grittingly hard missions like the one where you should transfer a VIP to Mars from some rock past the Mars orbit or combat entry distances for missiles, or maybe, for some, lack of some of the real physics elements the game doesn't account for light-speed lag!
Also, Aurora 4x + CoaDE + SpaceEngine = best 4x ever IMO.