The kit is very good value for money. It was easy to fit to my bike, except for the sensor detecting the pedal rotation speed. This is because the tubing at the crank on my specialized mountain bike is a larger diameter than a standard road bike. However I managed to adjust it so that it worked ok. After one year of use I find that I have had to adjust that sensor from time to time as it can move a little and the motor then responded intermittently, but adjusting it solved the problem. However Swytch have now offered to send me a replacement updated sensor and magnet disc to solve the problem permanently. Good service.