The Landroid Robotic Mower
This mower acts like most bot vacuums except for the fact that it is a bot lawnmower. Most kinds of grasses go under the blades with ease. The mower does not get confused on hills and is very quiet.
In fact, use this mower in the early mornings or late at night without disturbing your household or any neighbors surrounding you. It knows when to take itself back to its charging dock at the signs of rainy weather and even if the battery is getting lower.