This thing works! I am very happy with my purchase. Shocked how much dog hair, dirt, etc is collected. The Roomba meticulously navigates throughout your house and I was impressed how well it mapped my floor plan, including identifying room names! I wish I bought this years ago, such a good solution. Think of it this way, you either pay a cleaner 3x  for this price or you buy a Roomba and get hundreds of cleanings.