A pimple's length away from perfection...
Next to Valve's 'The Orange Box' 'StarCraft II: Wings of Liberty' is one of the few games that keeps on giving. That's a mighty bold statement for a game that practically started the trend of PC games costing more than they normally have but take my word for it--your money is well spent. Unlike the recent movement of games where the only purpose of the campaign is to train the player for the "real game" of multiplayer, StarCraft II's campaign is deep, engaging and replayable to an almost infinite degree, that's excluding the delicious challenge and custom skirmish modes. The only caveat that can be thrown at the campaign (or even the game in general) is it's super restrictive online requirements, it's pretty well documented among players how the game's "permission based" DRM has crapped out more than once rendering all but the folks who run the internet to play the game without any disruption. I won't even touch on the game's multiplayer, just know that it's an almost a self-perpetuating entity...!
In conclusion, the only thing holding back StarCraft II is its flimsy [but endurable] DRM, but it's one of the best values the money wary gamer could ever hope of buying.