Their whole chicken is amazing. Their brisket can be very good . Their pulled pork is soooo damned tasty. Their chopped beef is amazing too, though the sugar in the sauce may be too much for those of you not willing to "flex". Same with the fat in the sausage, which is delicious but may be too fatty for the die-hard Paleo. Their ribs are often dry and not my favorite.
They also have a variety of sides that should do the trick, from a vinegar based cole slaw, side salad, collard greens, to black beans (which some folks consider fine for Paleo grub). Sorry I can't help you on dessert :(