nAS is relatively easy, even for inexperienced raiders. I stomped through it with my PvP guild when it first dropped and we were able to farm all of the weapons for everyone in the guild, and not one of us was an experienced raider (not yet anyway). Watch videos, go look at the place while on your own (The bosses don't have a very big aggro table, so you can walk around pretty close to them), and give it a shot. It's not bad at all.