I've heard that it uses a lot of charcoal. I read somebody say that on a 12 hr smoke it went through 22 lbs of lump charcoal. Is that about right for the WSM and all charcoal smokers. I'm just starting to looking at charcoal smokers, had a MES for a couple of years. I have also been looking at the Big Steel Keg because I've heard it doesn't take much charcoal for a 10+ hr cook, and also I think it would make a good grill.