I've done briskets, butts, St. Louis ribs, dino bones and just about everything else. It does cook very well and a half load of charcoal burns for 4-5 hours easily. I love the room on this thing. After cooking for so long on my Yoder (easy bake oven), it's nice to have to worry about temps once in a while.
The only problem I've had is with the water pan. I'm not a fan of using water, especially on this cooker. Mine is 48" and dealing with the water pan is a pain. I've been running it without water and cooking at 275-300 degrees and the pan warped like crazy. I've tried to bend it back with no luck. I'm going to have to make a study deflector I guess.