I recently purchased a MES 40, not sure which generation, and I'm getting great results. I like the Bluetooth so when Im inside or at night I can check the status. Anyhow, I bought a 4# tri-tip, marinated it for two days and brought it to room temp. Smoked it at 230 for 2 hours, leaving a pan below it to capture the delicious juices. (I like to add them to my BBQ sauce or Au Jus) I pulled it at internal temp of 130 and covered it to rest for one hour, the final temp was 146ish. It delicious but I like my beef pretty rare and this seems a little more medium than I like. I'm not getting any complaints about that as everyone's mouths are stuffed with meat!