Last week I got a Sams Club MES 40. I proceeded to try my first cook with a brisket and two pork butts. Everything was rolling along great. The brisket got to temp first and I pulled it out. Then for hours the pork didn't seem to rise much. Finally the temperature of the meat actually dropped a bit. I swapped probes and they both read the same thing. Then I tried leaving the probe out to see the temp inside the box. It read 150-something even though the MES thought it was at 230! I cranked it up to maximum and the element came on and raised the temp, but still was reading about 80 degrees different from my probes. Since the brisket got up to 195 with no problems, all I can figure is the thermostat went haywire about 12-14 hours into my very first cook! This isn't common, is it? I finished the foiled pork in the oven. It was about 24 hours total, but surprisingly it was pretty awesome. The brisket was good too, especially the burnt ends. Not bad for my first smoke, but I'm a little wary about the MES reliability now.