I have a WSM, a kettle and I recently bought a GMG DC while they were on sale. My first cook on the DC was a rib eye roast that turned out very well. Everyone loved the bark and all I did was rub it down with Q-Salt the night before. Since then I have done a fatty and some chicken with good results. Each time I used Lumberjack pellets.
I really like the DC for the convenience and performance. I plan on using it quite a bit for small quick cooks. For larger cooks, I will use one of the other cookers.
One thing I have noticed is that the DC seems to have a little trouble with cold temps. A blanket over the top would probably take care of that.
As you probably know, the DC is WiFi enabled and to tell the truth it is really handy to be able to monitor pit temp and food temp on my tablet.