drove almost 500 km, the wheels are not worn out, there is no backlash in the rear bearing, it creaks - yes . and the backlash between the steering wheel and the front wheel . (the entire site) economy mode - up to 15 km, if the landscape is more or less even, 2nd mode is about 10 , and sport is about 8-10, it differs in speed of movement 1-15, 2-20, 3-27 - max from the hill, which is quite enough . in general, I recommend it, in the subway ok, they asked me to fold it once, but I go like this ISee full review