We bought this for our small garden in London. Garden is very small as is the house and idea of having big lawn mover was not an option due to no space where to keep it. We then decided to have a small robot and also save the hustle to cut grass ourselves and could just enjoy the outside space. Robot itself works very well and is very silent and have nothing regarding it's performance. However there is no way we can set it up to cut the grass for less then 4H ( we need max 30min for our garden) and for it not to cut every single day. Even for big garden I do not think it is sustainable to cut every day and cut the same cut grass for 4h and more. There is an option to manually turn the lawn mover when it is needed but that was the point to have it.