3 story house, 2 kids and several rags here - our Roomba changed our lives. It forces you (and the kids) to clean all toys in the evening, it will clean the living room every night and then I carry it to other stories as I see fit. I have also adjusted all our furniture to either sit on the floor or be "roomba tall" - and now I can not imagine how people live with that dust under a sofa or a wardrobe :)