Roborock Qrevo Curv

It empties into a 2.7 L bag, refills the robot's water, and cleans its own base, so most homes go weeks between hands-on upkeep.

The robot is 4.1 inches tall, so it fits under taller furniture but may not clear very low sofas or cabinets.

It clears obstacles up to 40 mm, so it handles most door sills and transition strips between rooms.

It washes the mop with 167°F hot water rather than auto-dispensing detergent, so you add cleaning solution yourself if you want it.