I've been an extremely satisfied Swytch customer for several years now and I've successfully transferred the kit from an older bike to my current city bike, The Orb Zeppo. This process alone shows one major benefit of Swytch, it is a transferrable kit from one bike to another - genius. Living in Sheffield, the Swytch makes lighter work of our 7 hills. I still have to pedal, which is great because I like pedalling, so still have to contribute my own effort to every ride but Swytch takes the sting out of all but the most severely steep which are best avoided anyway. Not only have I changed bikes but I've also changed batteries and I've now gone to the Air Max which is significantly more convenient and portable.