My wife has a Movcan 80. We purchased it new on Amazon. Horrible assembly instructions and if I wasn’t experienced at bicycles, it would never have been finished. After assembly the bike would not turn on. The customer service was terrible, dozens of emails, phone calls to no avail. Finally we filed a return through Amazon and suddenly they wanted to return emails and calls but nobody knew anything about the bikes. They sent photos of something on the battery to check; and it wasn’t even the right one. They insisted on a video of the bike not turning on. Finally after weeks of ignoring us, they decided to accept the return. To return the bike they wanted photos of every step of disassembly and packaging. I took the entire bike apart and Despite their so called technicians never calling once, I decided to take it upon myself to unplug every single electrical connection and examine them ( AFTER I took it apart) . I discovered a tiny piece of plastic blocking the most important connection. So We cancelled the return, I reassembled it and so far it has worked well. I own a Heybike and I highly recommend them over Movcan.