Enjoyable
Very enjoyable game. Only problems I have is the saving feature as someone else mentioned below me, and also it seems the AI is always one step ahead and cheats a bit.
Immediately after I set a piece down, it changes its turrets to correspond with that piece. That's like 10 turrets its continually changing. Yet it only has 1 or 2 banks to keep the cash flow going. Just seems a bit... awkward.
Other than that its good.