I received my K20 yesterday and couldn’t be happier. The instructions sucked but it was easy enough to figure out without them. I agree with past posts, they could have integrated the rear light. My biggest concern was that I’m 6’2” and it wouldn’t fit well. Those concerns are gone as the ride is very comfortable. Definitely need to get a helmet. Wrecking on this bike could cause major injuries. Bottom line is this bike is rad as hell.