The ultrasound system from Kress works great with trees and hard objects. Unfortunately, it does not work well with some bushes. Other manufacturers have also had ultrasonic sensors for more than 10 years. Only, these do not steer around but slow down almost to a standstill. These, for example, have a fixed SIM card and do not require WiFi, all-wheel drive, mowing capacity >3000m2, etc. It is important that the robotic mower fits the garden. Yours does. Equally important is it for the OP. He needs a mower with a boundary wire so that the mowing time can be distributed according to the areas and the narrow spot can be handled well.