There really hasn't ever been a better RTS!
It's not just the game that's great, it's the entire ethic of the production team - every element has been carefully crafted. The missions are punctuated by thought provoking cut-scenes, that in some way balance the horror of war with playing a computer game - this helps with the immersion and gives you something to dwell on during the reasonably short load time between missions. Realism is the objective, if you don't like game characters using very rude expletives then you will probably change your mind after lobbing your first pineapple grenade. Online the game is a hoot, you don't really have to get too personal with your opponents, but the in-game server allows it if this is something you value. If I were to hurl some criticism, it would be that on repeating missions in the single player game you often learn where the enemy will appear. The auto-patch is also a bit of a pain, but unlike other recent games, you can play it without a broadband connection, say on a laptop as your flight home takes you over Oosterbeek. Overall, the challenge of the game is superb, it's like playing Chess without the restraint of rules or a board - out-thinking your opponents in COH is a better brain exercise than Sudoko could ever hope to be. At these prices it really is something that should be in every game player's library.