The idea of Swytch is excellent and it definitely works. I have had it for ten months now. It is relatively easy to fit and is a simple plug in the various components and play. There are only two reasons that I cannot give it five stars. One: is that the battery life (I have the large battery) is not as quoted. Granted it is hilly where I live but the life is much less than you would expect, even keeping the power level to three or four (out of five). It's been tight some days! Two: the battery display lights on the battery pack and those on the control unit never match. This means that you are always unsure of exactly how much battery life you actually have left. So, yes, do buy a Swytch kit but I would say only get the larger battery. Enjoy!