I have been looking at the MES fo about a year now. I have read a lot of bad reveiws about Masterbuilt, that is until I found this forum earlier this week. With all the info posted here I realizes the smoker I was reading about was not the somker I wanted to buy. I actully learned more here than I ever learned form the Masterbuilt website and from their customer serves departmant.
I took the plunge last night and bought the 40" MES (model 20070710) with window, and REPLACABLE element & controller. I preseasoned it last night: It reached 275°F in about 30 minutes and held the temp well (dead band is +/- 5°F). I added mesquite chips during the 50 minutes; it took a bit for the smoke to start, but I was happy with the smoke when it got going.
I really want to thank all the people here for the great collection of infromation.
I can't wait to do some ribs and chicken this weekend.