So I smoked about 60 pounds of meat overnight (2 packers, 1 flat, and two picnics). Although it eventually came within a few degrees, the MES 40 (old style) never reached the set temp and was much lower until this morning (after 10 hours). Now I sit here watching the temps drop lower and lower. It appears it's giving up, ready to retire . Although the meat never got to the internal temps I wanted, it was still falling apart (tongs broke through the meat like a spoon in ice cream) so I'm not going to bother putting it in the oven. Winner: 60 pounds of meat, by a knockout. Truth be told, I've only used the MES 40 a handfull of times. Even though I love the output I'm not impressed by the quality of the unit. It costs way too much money for the number of times it was used.