I don't buy anything "semi-boneless" on principle- it's an oxymoronic term and I don't support that kind of labeling. Either it has a farkin bone in it or it doesn't.
However, I've never smoked lamb before and I am very tempted to take advantage of the holiday sales just to try it. If i do buy any, it'll definitely be bone-in as I save them for use in soups and chili.
"Eating 'Que isn't making me fat- it's the beer I drink while lounging by the pit."