We bought this new product just the other day, it is now the second chief cleaning after me))) Now dust and dirt are clean on it, I don’t even touch it, it cleans really high quality and well. Although I was skeptical at first. Plus, Roomba® j7 uses the PrecisionVision navigation system to recognize objects and avoid obstacles like cables and pet waste. I manage it through the application, I like it so much, I set up a cleaning schedule for it for a certain time.