Water is a big problem.
The technology is fantastic. The engineering/build is an issue. The RTK antenna is not water proof as the circuit board was sitting in an inch of rainwater that had gradually collected. It now does not function at all. I am now waiting to hear from Mammotion about what will happen next. It seems there are some simple fixes that could be made to prevent water problems. A redesign of the antenna shell without exposed seams should be a priority as there seem to be a lot of customer’s experiencing this issue. With that, I love this machine, and will continue to endorse it as I believe the company can fix this problem.