I bought this game today and played one Mission in coop, so I have an experience of about 70 Minutes of the game, but I can already tell that this game is worth spending 10 $ on, as long as you like Strategy Games (REAL Strategy, not that stuff you do at Age of Empires or Surpreme Commander!), got at least one friend who is willing to play it with you, and you dont give up after the first 2 failed tries. I never survived the first 5 Minutes of a Mission at Single Player (I need to get a feeling of the game first, how the AI reacts in several Situations, because I LOVE creating Tactics and watch them collapse as soon as I am engaging an enemy), but I managed to play throught a Mission in Coop and it was the biggest fun I had with my PC for at least the last 3 months.
So, if you think this is your kind of game: BUY IT! Right now! Stop thinking about it and just click that Button up there!