I have it. It works as well as you might imagine. If you like Game of Thrones, and you want a Game of Thrones trivia game, you should probably get it. The questions are well-weighted.
The gamey aspects, such as the area control and push your luck are neat mechanisms that make the game that bit more interesting. I don't think they work very well with just two players, however, it's much more interesting when you're competing for control with more players.
The only downside to the game is that the box is stupidly big. I'm assuming they have plans to release expansion question packs, but even with that taken into consideration it's twice as big as it needs to be.
Feel free to ask me any specific questions about it