No brakes! Every time we went into the ships elevator, which is only about 2 inches deeper than the scooter length, we seemed to bump the elevator wall. If power is turned down to go very slowly wheels cannot pull themselves out of the gap between elevator floor and lobby floor, add power and hit wall. Several times I released the throttle and scooter kept moving once hitting a fellow passenger, no injuries thank God! Why are throttles no not progressive as on most motorized riding devices such as snowmobiles? And why no brakes, I am surprised these devices are even legal, or that cruise lines allow them on board.