Functionally speaking, the kit performs very well. The controller is set up with five assist levels which kick in gradually, notwithstanding the sensor is a pedal sensor, not a torque sensor. Switching assist levels with the simple GO controller is smoother and easier than switching ordinary gears. Assembly did not present undue difficulty as long as care and time were taken. The magnetic sensor mechanism and new wheel went on without trouble. The biggest problem was in dressing the wiring harness. Swytch should try to figure out how to provide harnesses in varying, or short-but-extendible lengths. Basically, no matter what method of wire mounting in used, all of that thick black wire looks terrible, whether wound up, taped over, or whatever. Swytch should warn users of the brake sensors that their use requires exposing a portion of the interior cables, which means removing the cable, cutting the casing, and re-tipping the cables. This was all too much trouble so I have the sensors but am not using them. Packaging of the shipment was excellent, no damage was found, and no components were missing. Time between order and delivery, however, was several months. Customer service was quickly responsive to complaints about delivery time, and questions about assembly. At the price I paid, the kit was good value at the time I ordered it; but as time goes on and ebike components become cheaper, Swytch will have to follow along.