We had one for 6 years until it finally died last year. Hubby worked abroad, I’m disabled and couldn’t manage our petrol mower. It was great!! Not perfect as you still need to manage the edges of the grass (certainly in our garden). We only have grass in the back, and went for a middle of the range Robomower which was about £1500 back then. Blade replacement can be costly, and we did have a few instances of the outer wire perimeter wire being broken which stops the mower working (painful finding the break!!), but overall it was a great success. Didn’t replace as hubby was retiring and would be home to mow. It costs about £20 round here for our lawn mowing so it wasn’t a cheap option but suited me as I didn’t want someone having access to our garden whilst I was at work.