In combination with Roomba 985 (wish I got the i-series or s) the Roomba vacuums all the dust and pet hair as well as any other debris. The Braava wet mops up foot prints, spills, spots, dog prints etc. I can run them at night and have a cleaned floor in the morning. For touch ups or sweeping, i tell the Braava which room or area I wan it to clean when I leave for a work out or errands and the floor is cleaned up when I get back. Saves time and arguments as to who needs to vacuum next,