This scooter is a lot of fun. Actually I am a senior, not a kid. But my size is small. My scooter is for neighborhood shopping. The speed is OK , safe enough. The brake control needs a little practice, its because when you step on the rear cover to create friction to slow down, you might lose some balance, at the same time, your back foot has to stay away from the rear senor is disengage the motor. But its not difficult. It has about an hour of ride, maybe 45 mins. Going up a slope is not quite possible, my weight is 135 lb, may be for a kid is possible. Oh, the suggested weight is actually 120 lb. Some website say 130 lb is over stating . I think for all scooter riders, uneven surfaces must be very careful. I flew off the scooter because I ran over a small piece of thick glass, hardly noticeable.