I'm a Bikeability instructor and use my bike for work, unfortunately my lower back was injured in an accident so steep hills can agreviate it. So Swytching my bike up has been a godsend to help me get to and from work & do my job on bad days. It also means that my bike stays light enough to be easily transport by car to different areas. I bought 2 batteries, a large 1 to get to and from work and a small 1 to use all day when teaching. I like the fact that I can switch off the power to do slow demonstrations and the bike is still light and easy to pedal. I waited to buy by using the promo email to reduce cost. It was easy to assemble the Swytch changes to my bike with clear instructions and videos.