I've had a great experience with Ausom, and I actually did have to contact their customer service for a couple things. They helped me upgrade to a dual-motor model sincr I realized I'd get the single-motor after moving apartments. Scooter arrived quickly, it was super affordable, and it's built like a tank. I've recommended it to loads of friends, and I've put over 50 miles on it already, probably gonna hit 100 miles before February. Shenzhen is totally the Silicon Valley of the 2020s, kudos!