I do not personally own one of these, but I saw one for the first time ever a couple of days ago. At first, I laughed because it seemed do hilariously 21st century to me. Then, I realized this could actually be very useful for people who can't use a typical lawnmower. Many of you might be familiar with this, but it's new to me! I'm not sure what brand the one I saw was because it was actively mowing in a stranger's yard, and I'm sure prices vary, but here is link to an article featuring several models: https://www.digitaltrends.com/cool-tech/best-robot-lawnmowers/. If anyone has one and recommends a certain brand, please let us know!