I bought this for my wife who has suffered with chronic fatigue and has a pace maker fitted. She used to enjoy cycling and having a mountain bike for off road was an excellent excuse to enjoy the countryside we used to throw them in the car and go off for weekends. This I hope will enable us to do this once again. A fantastic piece of kit. The instructions for assembly onto the bike are clear and simple. The connection details also made very easy in the book. Just follow the instructions. The only thing with our set up was my wife has a front derailer and it was necessary to make a bracket to fit the Sensor, that was a little difficult but being an engineer I over came it with a bit of nylon, patience and a few tools. Would thoroughly recommend converting a bike that is a reasonable cost?