Too bad it's not actually FILMED in Illinois
Dunno, just think it would be more authentic if they really did film it in an actual, real, small Illinois town (Peoria? Well it's not small but it is a quintessential Mid-West factory town).
Would be more believable if they did not show those perfect, leafy, white-bread, Californian suburban streets. Bit of the grimy rust-belt Mid-Western milieu (where I grew up) would be more believable.
Despite that, it's funny as hell. Did not know it's improv, they are so good it seems scripted. Well maybe this proves something (like, "..real life is more interesting than fiction..") -- improv is better than script because it is real life.
Gonna watch this again, that's for sure.