Second-generation Xiaomi (an Essential, but it stopped being one two days after getting it out of the box). Put a big battery and 10" tires on it and it's still going strong today, four years and several thousand km down the line.
Technically also a Kugoo S1 Plus, which didn't need any repair work at all for... oh, I wanna say two years. But then its battery died, so I'm not sure how much it counts in this context.
Kukurin is a pretty good brand to alot of people (me included so there is bias to this response). Some people just want a pretty fast scooter with ok build quality for cheap. Kukurin fills this niche very well.
It's an amazing scooter, just get. You'll be very happy. Trolls are spreading sh*t about KuKirin because they overpaid 3-4 times for equivalent scooter or bought a kid's toy Ninebot with 350W motor and they're sad. Get the KuKirin, bro, amazing brand and very reliable.
IronMew
