Kit was good. Fairly easy to fit to my Trek comfort bike once two minor problems were resolved. One problem was the cadence sensor was impossible to mount on my Trek's strong frame. I had to use my modelling skills to make a substitute mounting bracket. Another issue was that the motor wheel supplied had a metric spindle while my US bought Trek appeared to have an English units fork slot. Easily solved with a flat file in minutes. Extremely pleased with the performance of the motor and battery. I live half way up a steep hill so the upgrade makes my cycling so much easier.