Very cool stuff! Very useful! I can offer to buy! There are just few thing I do not like. The control range is very narrow of both accelerator and brake lever. With half gas I can only go on very smooth road. Otherwise no chance keep the lever on half gas. The brake is worse to control. It look like a simple on-off switch with timed rump up brake force. I couldn't set half brake force for longer than 1 second. Brake becomes either 100% or 0% very soon. There was loud noise due to shaking battery, but I could fix it. I have whetted 1-2 mm from the button of lamps what are on the end of hand arms, because I couldn't leaning it against a wall without swithed on the lamp.