I have a chubby. It works very well. The only time it burps is when you use bit. coal in it. Thats because of the volitiles. When they are burned off the problem goes away. Then it only burps if you don't open the two dog ears on the side. It is not a clay pot, it's a steel pot that is virtually indestructible. I would recommend a chubby to a first time coal burner because it is very simple and forgiving. A chubby is only rated for 60,000 btu. but it cranks out the heat.
The gentleman I purchased my chubby from fabricated an aluminum plate to cover the cleanout during shaking. this cuts down considerably the dust.