It works very well especially on hills. Improvements to service. 1 Buying platform is a bit hit and miss and follow up confirmation confusing as to nest steps resulting in a longer delivery period. 2 Delivery....rim damaged in box which had been damaged maybe by fork lift forks. 3 No width option for wheel rim ....respoked onto existing rim. Battery....unable to use last 40% of charge. Reprogramming as described in user book dis not work. 4 unable to contact anyone on phone after payment to discuss rim width options. Good price, functions well and pleased after installation completed.