Fantastic game!
As someone who isn't a huge fan of the strategy genre, I was a bit hesitant to go pick up Starcraft II, think it would eventually just be pitched aside after a few days. But I'm of the opinion that this game truly fits perfectly into the "easy to learn, difficult to master" description. Even if you're complete new to strategy games you'll find the core concepts very easy to grasp when starting as Terran, and will find it very rewarding to play as you always feel like you're learning something new every time you play the game.
Despite the fact that this is only one campaign, the game is definitely not short on content, the single player is more than long enough, with great mission variety, and difficulty based achievements to keep you coming back, giving it a ton of replay value. On top of this is the challenge missions, which help teach you how to play as the various races, and of course the multiplayer, which of course could probably keep you occupied for another 10 years.
One nice extra is that the game will give you the option of searching your facebook friends for anyone else with a Battle.net account. I just feel it's worth noting, as I ended up playing with a ton of friends who I had no idea were gamers, and as of the last couple weeks have had more friends online in Battle.net than on Xbox Live.
So yeah, the final point is, whether your a strategy game fan, or not...this is a very high quality game, obviously very well put together and is far more deserving of your $60 than almost any game out there right now.