I was very excited about this robot vacuum cleaner after purchasing a Midea window air conditioner and dishwasher. Right out of the box, the vacuum cleaner struggled to clean my living room. It will continuously clear a 1 foot area and stay there for 10 minutes. This resulted in my floors being damaged as the machine could not clean the entire room. I contacted the manufacturer and they offered no support and instructed me to return the Revain device. Very disappointed with this car.