My complaint about JamBone is more a complaint about me -- feeling the need to clean my plate, which is a huge supply of food, more than I should ever eat at one sitting, but I never take home any leftovers.
Service? JamBone is for the most part, a counter service restaurant. You order at the counter, fill your own beverages, etc. That may be confusing to some people who expect it to be a full service restaurant.
When I've been at night, the cocktail servers are working their booties off, keeping the beverages well-supplied.
The BBQ at JamBone is some of the best I've ever eaten (and I've eaten BBQ all over the south east USA, including many championship BBQ festivals) and the slaw is awesome with the Jalape?os.