Don't buy
The luba is a strong machine and can handle slopes very well. BUT other than that it's a overpriced piece of sh**. If you want it then make sure to "babyproof" your yard. Because it will run over obstacles and damage your plants. When it gets stuck it will burrow itself so it gets more stuck. It's too relient on satelite positioning so most of the time it doesn't know where it is. The app is allright but there is no option to overlap work areas. I would not recommend anyone to buy this.