using a rotisserie unit cooks your food evenly because you are cooking with indirect heat as opposed to direct heat, which you always have to monitor. i use a small version of the big guy ones for comps using my weber kettle and have taken grand champion as well as other 1st 2dn and 3rds. i also see other teams using the smaller version as well and constantly winning. so if you are on the fence, get of and start spinning. whether you use the big boy or small rotisserie it will turn out the best.
and in case you missed my chicken post, here are some wings to prove my point. these shelves are 17"x5" and fit my weber, gasser and uds.