I've owned a series of kamado style cookers since 1976 along with metal charcoal cookers and gas grills. I currently own 3 kamados made by Primo that I use at home and for BBQ competitions. Believe me, they produce award winning BBQ. The reigning South Carolina State Champions won using Primo kamados.
I like them because a little charcoal goes a long way. I have run a kamado for 26 hrs. at 250 degrees F on 8 lb. of lump charcoal. (Something you can't do on most metal cookers.) As others have said, their only drawback is their weight.
Good luck with yours.
Bill