I am the one that started it in my family. Had the small domed electric ones first, then got a masterbuilt one off a swap site for $40. it was a floor model from Lowe's and still had the tag on it it was only used once.
After about a year it was just too small for doing ribs and full briskets. My brother worked with a guy who's dad was selling them, GMG brand, and had a couple DBs left. My brother called and ask if I wanted one. I told him I would think about it. He went and bought it and assembled it without telling me. He gave it to me for Christmas and then smoked two 14 lb briskets on it.
Well, went to Christmas mass that night after I had put them on before I left at around 9:30. Temp was set at around 190 as it was about zero out. Had the thermal blanket on it also. Came home and things looked well, so I went to bed. Woke up at around 4 am want looked and the temp was crazy high at around 300 inside the smoker. It temp was around 210. Immediately pulled them off, foiled and covered in towel. Let them sit in the cooler for 8 hours. They really were not too bad. The outside thin part of the flat was a little dry but just put gravy on it and it was fine.
Called GMG up the next day and 3 days later I got a new controller that had the WiFi option, as the one I had was a non-WiFi model. Talk about service!! I have am going on year 3 with it and the only things I have done to it was add a second shelf and add the front shelf on it.