I just used my Maverick for the first time last night on my gasser, just to play. It was interesting and kinda a PITA. I can see why people do the whole grommet thing.
But the pork loin was one of the best I've ever cooked, maybe coincidence?
18.5" WSM ; 22" Kettle ; Weber E-330 ; Weber Q200 (for tailgating)