I have the Sinch. It is great. I got fenders, rack, lights and a mirror. I also use clip-less peddles. Mileage is good. The only downside from my perspective is you can't lock the bike with a key. I carry a lock with me so I can lock it to something or lock the wheels so they won't roll. I don't know anything about the Sondor but watching the video, it appears to be the same bike.