So I almost got the 1150 just for the ash tray, but I went with the 850 cause I really didn't need that big, and I'm really glad I did after reading all the problems you all have with the 1150. At least my 850 keeps any temp I set it at, not sure how accurate but it does maintain temps very well. I do have to clean and vacuum out the fire pot every use (too mush ash build up) but it's not that bad. The grommet for the slide handle split in two on first use (ID and OD are too close) but that's not a problem cause I plan on a modification to the slider anyway. I still don't know what Smoke Density Control is but that's another issue.