I have a fenced backyard about 0.25 acres and the front yard with walkway. The version I bought is free installation so after appointment, the installer took about 2 hours to install it.
The product works well. especially on my back yard, it mows diligently on its scheduled time and back for charge until getting the job done. For the front yard, even it is complicated several pieces, to my surprise it works too. But I have to move the mower to the front, put it to work then back to charge. But anyway, I don't need to mow by myself.
I did get a problem earlier this year when I tried to put the mower to work, but found it did not start, the light on the charge station flashed. I called the installer to take a look, was told the cable in the ground was broken. He took 1 hour to find it and told me it was eroded. But I thought it might be the squirrels who hided their winter food such as black walnuts destroyed it.
Anyway, the product itself is very solid, it is made in England. I did not have any problem with it so far.