Ah, Stargate: SG-1. I really liked this game. My experience is the one written by AEG. The book is a true tome, and for any fan of the TV series worth the price just for the in-depth background presented which takes up about half the book. I have actually incorporated many of the game mechanics of this game into several of my former campaigns. Of course, I am partial. The book is great for first time GMs too.