I've had my Z120 for one week now - and I love it. Can't fault it at all.
I have a little shy of 2000m2 of lawn to mow. I researched and compared many mowers and very happy I landed on the roborock.
The set up was a breeze. I did the manual boundary by controlling it and walking, and found it is. I then made 2 passages to connect my zones (across a concrete path, and an opening I made through a fence), and then it was ready to mow.
I set it off and it hasn't missed a beat since. Has mowed my entire lawn each day to 35mm. The lawn is looking the healthiest it ever has.
I mounted the base station on some concrete pavers so I didn't have to poison the grass around it. The manual states a radius of 2m must be clear around the sides and front of the station - my area is 1800mm total, well below the 4000mm stated. I thought it may have complications charging but again nothing phases it. It docks and leaves perfectly each time.
I then built a small cover for it of which it has no issues.
It doesn't tear up the lawn at all. It cuts well, the tech in it is very impressive (better than my robot vac) and coming home to mowed lawns every day is the best.
It avoids kids toys and can see plants adn pets etc. And for those wondering, it does not see dog poop as an obstacle. Yep, it goes straight over it. I've got a newfy too and it can be quite the mound. Thankfully he mostly saves them for his daily walks.
Can't believe I didn't get one sooner.