There's really only one: The Segway P65D. I have been riding e-scooters for about 8 years and have bought various models. None of them has the reliability of the P65D. When buying a scooter in Switzerland, make sure to check the water suitability value. If you don't find anything about this in the papers: Hands off. It rains and snows here. The controllers of many scooters quickly fail.
Sam

Hello, I bought the P65D a few days ago.
I am very satisfied with Sallin's ability in steep slopes. I don't lose any power. No need to push with the foot. Ninebot is a robust and reliable brand.