Had great potential, but too short and too much backtracking (SPOILERS)
I completed it in about one and a half hours, it was very linear and too short for my liking. there are only a few areas to explore and they are look pretty much the same.
The main game plays out become a slave, collect ten steel ingots, go back to midea, the have three battles in the arena, then go to haven steal baby (or not) go back to midea, then go back to wernher, switch off floodlights and the go back to wernher and the thats it.
Unlike operation anchorage you can go back and explore but the city is dead, not much too, not enough quality content to compel into going back.
There are a couple of new weapons, both fairly useful in combat, but nothing great.
I know that a add-on is not meant to be 20+ hours, its just meant to slightly extent your playtime and pleasure, but still i expect at least five hours to play with.