I liked the device. There is something to compare this one with. I had 3 before that they beat the mini-robot m365 and Kugo m5. A good range of 40 km and there were still 5 divisions out of 6. Of the shortcomings, I can say about the low ground clearance and long wheelbase, you need to take into account the passage of obstacles. Lack of a rear handle to raise the back of the scooter. The chambers in the wheels need to be maintained at about 4 atmospheres without a chamber would be much better. And the PR code application does not work from the word at all. I had to surf the internet and look for another KCQ scooter app. And so happy with the purchase.