Just bought a new gen. 2 MES 40. I attempted to use it for two racks BB. WOW! Temps all over the place according to Maverick 732. I have a feeling this is going to take a lot of time to get a feel of things before it will be a "set and forget it" as some people have expressed on the MES forum. The ribs took way longer than the 2-2-1 method. Finally I had to put me to bed and the ribs in the fridge. Finished them in the oven the next day, and to my surprise, they were pretty darn good. Oh well, we'll get the hang of it. But if I'm planning to feed someone else, I'll have to have it dialed in a whole lot better than the first attempt.