This is a truly guilty pleasure. It is so much fun watching the madness ensue.
Typically I see one family that is somewhat normal with a few problems, and they switch with a family that is extremely bizarre and way outside the norm. One episode featured a poor family that hunts to lessen their grocery bill and put food on the table. They switched with a family who are raw food vegans and the mom thinks you can get all the food you want by looking at the sun. Also I noticed that typically one family will refuse to comply with the new rules. As in the Vegan/meat eater family. The vegan mom refused to see the other side and then expected the family to follow her rules.
But the insanity is always there. Right now there is an episode on where a mom who is more or less a slave to her husband and son switched places with a Wicca goddess whose family worships her. The Wicca kids talk to elves and fairies.