If you are one of those people who live in a house, then you need to have a vacuum robot with a function to recognize stairs. This function is indicated by the manufacturer as a fall protection function. So be sure to check this feature before buying a vacuum robot. If this function is not specified by the manufacturer, then the device does not have this function. Do you have an apartment where there are still small section between the rooms, then you should keep in mind that the robot alone can not overcome these small stairs. So you have to carry the device after cleaning a room in the other room. If you live in a very winding apartment with many rough edges, you should make sure that you can attach extra brushes for the corners before Buying a Robot Vacuum. In addition, the Navgation must be on a high level.