Plus, find out how we tested the top robot vacuums and which one is best for you. It’s a popular choice among robot vacuums, so much so that it’s currently sold out across big-box retailers. It got closer than other robot vacuums we tested, but this is still a common struggle for many other models. LiDAR is especially useful for creating accurate maps and is the most powerful and most common navigation tool for robot vacuums. Lastly, if you have kids, many robot vacuums are capable of picking up small toys (or parts of toys) that are strewn about.