Link to article: http://blog.askmrrobot.com/krosus/
Having real boss scripts is a huge improvement for simulations - the more accurate we can model the game, the better the gearing advice will be. We'll start adding more bosses (and faster with the next raid, promise!).
The article explains what is modeled, and gives a few tips on how to customize it further. It is currently setup for DPS and Tanks.