I have been cooking a good bit on my Dads green egg. He claims it's a smoker too. But it really isn't a smoker. It holds smoke in better than your normal grill ever could, that's for sure. But you can't smoke your meat with it the same you can a traditional smoker.
Adding extra chips is very difficult to do and there is no place for a water pan, so your meat doesn't' stay as moist.
And don't get me wrong, it's an awesome grill. But after looking at it's cost and what it's actually capable off. I would get a nice Weber and a nice electric smoker separate...you would still have extra cash left over to buy a nice little fryer and work station. You'd be set on all levels at that point....cooking like a bauce!