Just got me a MES 40 and so far my smokes have been all over the place! First time I burnt everything in it and over cooked the second time (but eatable). Before I cooked again I checked IT with my heat setting and found it to be 25 degrees off (set 225 would run 250). Third cook was awesome and fourth cook was just ok however forth time was my first try at turkey. I am learning that it cooks faster then my old offset a lot faster. I have wondered if it's because it is air tight and loses no heat. My next cook is going to be a brisket at 200 (I will set on 175 and test it).