I have a SS chest from Sams Club, I think about $400 circa 2002; about 5 ft tall and 2 ft square. From top to bottom there is the cook chamber with 4 cooking grates, a drip/water pan, 2 drawers for wood chips or pellets and a pretty large U-shaped burner. It cooked what I thought was some pretty good Q for 10 years after some minor mods. The drawers for wood chips sat right on top or the burners and were way to prone to ignite so I put a 1/4 steel plate "top" on them with a few 1/4" holes to turn them into smoke boxes. I also had better luck with sand in the drip/water pan, usually saturated with apple juice. The sand really helped hold consistent temps. I finally got it dialed in but had to watch it like a hawk. On the effeciency side I could usually get 4-5 cooks out of a regular grill sized propane tank. I was pretty happy with the Q until I built my 120 gallon stickburner. Nothing like real wood; much better flavor & bark. The old SS Sams smoker has been retired to a warming oven for sides & baking cobblers, etc.