Now that it works it is like magic and is a game changer for me. However, there are a few things to be aware of. 1. The kit is not as easy to fit as one is led to believe. I can change a tyre ok but fitting the kit to the pedals is beyond me. I took my bike to a bike shop where you can test ride Swytch but even then it didn't work properly at first and the gap between the pedal disk and sensor had to be adjusted. 2. The bike is now very front heavy and I worry going down very steep hills so take them very slowly and stand on the pedals to lower my centre of gravity. I feel if I ride I might go over the handlebars. Probably not likely but it feels that I might. 3. Even the max battery runs down quite quickly especially on hills. Might not do so for a faster rider who produces more pedal power than I do. I ride on lowest power except when going up very steep hills. 4. It takes a bit of getting used to especially starting, stopping and going up hills. The power doesn't kick in until you are peddeling, if you ease off peddeling, even for a moment, going up a hill you will stop. You may find yourself going faster than you are used to and braking more at junctions. 5. I have strange handle bars and the Swytch people weren't sure the battery holder would fit but it does so read everything on the website and look carefully at your bike before deciding whether or not to buy. All in all, despite the above, the kit has made a huge difference to my bike riding. I can now cycle up the steep hill I live at the top of.