I have never used one before but had read previously that it sucked. Did some Google-Fu and loaded up my test world to see just how bad the process was. I would still recommend the stone kiln. It doesn’t take that long to stockpile a tremendous supply of smoked meat and/or pemmican with the new butchery systems. Given how much meat drops now, you probably need two charcoal kilns and four smoking racks just to get it all done before the meat spoils. Then you don’t have to worry about it again for a long time. If you need stone to build it/them just burn down a building or two and you get all the stone/nails/wood-ash you might need.