As I'm getting on a bit in age I thought it time for a bit of help getting up the hills and the Swytch motor certainly does that. Mine is one of the early kits which was then reasonably priced and easy to fit and has served me very well over the 2 or 3 years I've been using it. When the new battery was advertised, being smaller and lighter I thought it a good idea to change but on looking at it it was too expensive costing more than the original complete kit so I left it at that. All in all I'm very pleased with Swytch, it does everything I want it to do and helps me to keep fit and mobile. Highly recommended.