Played since Alpha so the 6h aren't exactly accurate.
Let's put it easy, the game isn't bad. It isn't outstanding either.
It has some nice ideas especially the shipdesigner is great, probably the best around and watching the spacebattles is real fun (I say "watching", because the pilots do not really need your help once the dogfight starts). On the other hand the empiremanagement is very unchallengeing, almost nothing to do and to put it blunt: Best you leave it to the AI so you can concentrate on the big picture.
Now, what is the problem with this game? Why wouldn't I recommend it?
Well my downgrade has nothing to do with the quality of the game itself, but with the simple problem that the developer didn't implement all the features promised, but instead realises them in a different version of the game named "Stardrive 2". I wouldn't complain if he simply made part 1 and then turned to work on a better part 2, like many other developers do. But he's implementing features in part 2 that were explicitly promised for part 1.
So, downgrade for bad management.
But if you enjoy ship desinging and watching space combat, you might give it a shot if you can get it for a 75% discount.