We set up our new Roomba and let it clean. It had to recharge twice before cleaning everything we wanted cleaned. But it picked up where it left off and covered everything. After two different cleanings, a map was created with zones. It showed where Berta cleaned and she got everything. I can name the zones to allow cleaning only in those zones or choose Clean All. We are very pleased with it. We have some thick carpet in areas but Berta cleaned those areas like a champ!