The kit worked first time. As a 77 year old I was aware that I was not using my Brompton as much as I used to. Having an electric motor to assist hill-climbing and longer rides has encouraged me to use the bike more. On the down-side, I was disappointed with what I perceive to be the poor quality of the multi-pin connectors. I should say that before retiring I was for over 30 years an experimental scientist (who designed novel electronic equipment) with experience of how penny-pinching on connectors can get one into trouble. I wonder if Swytch has changed its connector supplier recently. If the connectors fail I will expect free replacements.