I don't have personal experience with one, so I will state that right up front. What I can say, is I have never heard a bad word about them. Solid, beefy parts, and seem extremely well liked by those who do own one. On the plus side, you get to call it an AR-10 without harassment.
Those guys will be around to help shortly. The Armalite pushers on this site tend to be heavy drinkers and like to sleep in. It's about 3PM back east right now, so old man Rsquared should be getting up soon.