I have to say ... as you can see from the post above, MES seems to take care of us customers. My MES 30 hit a glitch a few smokes ago when I was trying to take it up to 275* at the end of a smoke to get some nice crust on a roast and the unit could not rise above 247*. I called MES and a nice lady told me that she thought it was a problem with the wireless control head. She said that they were on back order but sent me one of the old style ones which was non wireless (no remote function) and would get me a new wireless one out when they come in.
I'm pleased with them and I do very much enjoy my smoker. Oh, and another thing: While I was on the phone I asked her about the fire box upgrade to see if my unit had it. Well, I tried to get the serial numbers off the back of the smoker for her but they were badly scratched from shipping or assembly so we couldn't determine if I had the upgrade on mine so she shipped me the new wood tray assembly too. It turns out that I had the new deign but as luck would have it one of the spot welds just broke on my chip tray and I have a new one on hand! Thanks to their customer support.
I still want to get one of those AMAZN smoke trays for the pellets though.