Yeah, I don't think it's a smoker. I think it's a grill. When I grill on my Kamado Joe, it takes a lot of fuel to heat the ceramic shell, but once it's hot it coasts along on very little fuel. I can open it up and put cheese on 10 or 12 burgers, close the lid and it's right back at the set temperature.
As GREG wrote, when the ceramic is hot the pellets will stop dropping and you'll likely snuff out the fire.