They stand behind their product.
I am impressed with the Luba 2 mower. It mows well and has easy to use controls. After some time of using it with no issues, one day I did run into a problem. It started having an issue staying connected to the network and Bluetooth. I opened a warranty claim to the Mammotion team, they had me send in the unit. They were able to resolve the issue and send me back a fully working Luba 2. I understand that it is inevitable that any mechanical devise will run into an issue. I am impressed by the Luba 2 unit and by how the Mammotion team stood by their product and resolved the issue.