It's fun, bit different than other 4X imo. The macro stuff is a little less involved imo, taxes, morale, planets are all pretty easy to manage. It's not got as much depth that way as say Endless Space, so if you're a research/resource/planet micro managing fan then it probably won't grip you as much.
The combat though has a very good/solid base, it's still fairly shallow, you design a ship, a fleet, build it then send it to fight the enemy. The ship customisation is a lot better than Endless Space, you can design your ships on base hull designs, power, engines, weapons etc are all there to be played with.
Overall the game is a very solid start, it has a lot of potential but at the moment, there is still quite a lot unfinished or needs to be improved.
I purchased the pre-order and have to say for £20, yeah worth it. That's an evening out drinking, or a takeaway
