Neato D-shaped robot vacuum cleaners are specially designed to get deep a corner to corner clean, as well as under tables, chairs u0026amp; couches that round robot vacuums leave behind with their circular design. They have a special helix multi-surface brush roll for deep cleaning on carpets, hardwood, or tile floors. Many of these models also come with powerful suction power and high-performance filters to trap allergens like pet dander u0026amp; pollen in your home.