I went over to a friend's house to watch the Chiefs-Chargers game a few weeks back. He smoked a prime rib with some Rufus Teague rub and some apple something or other in one of the trays of a BGE. He brought in around 3pm, cut and served. I was completely blown away at the flavor! Just incredible.
Now, one of these is on my list as well, so thanks for all of the info in this thread.