When buying a robot, I paid attention to the price, power and battery capacity. The robot fully complies with all the characteristics stated in the technical data sheet. For several months now it has been working without failures, without requiring special conditions or special care. Every few days I empty the trash can located under the top cover. Inside there is a filter that significantly cleans the air from fine dust. The robot performed well on various surfaces, including ceramic tiles. Wheels don't slip. The robot cannot up large pieces of dirt, paper wads, and other large debris. So do not rush to get rid of the broom.